| // SPDX-License-Identifier: GPL-1.0+ |
| /* |
| * $Id: synclinkmp.c,v 4.38 2005/07/15 13:29:44 paulkf Exp $ |
| * |
| * Device driver for Microgate SyncLink Multiport |
| * high speed multiprotocol serial adapter. |
| * |
| * written by Paul Fulghum for Microgate Corporation |
| * paulkf@microgate.com |
| * |
| * Microgate and SyncLink are trademarks of Microgate Corporation |
| * |
| * Derived from serial.c written by Theodore Ts'o and Linus Torvalds |
| * |
| * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED |
| * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES |
| * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE |
| * DISCLAIMED. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, |
| * INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES |
| * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR |
| * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) |
| * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, |
| * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) |
| * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED |
| * OF THE POSSIBILITY OF SUCH DAMAGE. |
| */ |
| |
| #define VERSION(ver,rel,seq) (((ver)<<16) | ((rel)<<8) | (seq)) |
| #if defined(__i386__) |
| # define BREAKPOINT() asm(" int $3"); |
| #else |
| # define BREAKPOINT() { } |
| #endif |
| |
| #define MAX_DEVICES 12 |
| |
| #include <linux/module.h> |
| #include <linux/errno.h> |
| #include <linux/signal.h> |
| #include <linux/sched.h> |
| #include <linux/timer.h> |
| #include <linux/interrupt.h> |
| #include <linux/pci.h> |
| #include <linux/tty.h> |
| #include <linux/tty_flip.h> |
| #include <linux/serial.h> |
| #include <linux/major.h> |
| #include <linux/string.h> |
| #include <linux/fcntl.h> |
| #include <linux/ptrace.h> |
| #include <linux/ioport.h> |
| #include <linux/mm.h> |
| #include <linux/seq_file.h> |
| #include <linux/slab.h> |
| #include <linux/netdevice.h> |
| #include <linux/vmalloc.h> |
| #include <linux/init.h> |
| #include <linux/delay.h> |
| #include <linux/ioctl.h> |
| |
| #include <asm/io.h> |
| #include <asm/irq.h> |
| #include <asm/dma.h> |
| #include <linux/bitops.h> |
| #include <asm/types.h> |
| #include <linux/termios.h> |
| #include <linux/workqueue.h> |
| #include <linux/hdlc.h> |
| #include <linux/synclink.h> |
| |
| #if defined(CONFIG_HDLC) || (defined(CONFIG_HDLC_MODULE) && defined(CONFIG_SYNCLINKMP_MODULE)) |
| #define SYNCLINK_GENERIC_HDLC 1 |
| #else |
| #define SYNCLINK_GENERIC_HDLC 0 |
| #endif |
| |
| #define GET_USER(error,value,addr) error = get_user(value,addr) |
| #define COPY_FROM_USER(error,dest,src,size) error = copy_from_user(dest,src,size) ? -EFAULT : 0 |
| #define PUT_USER(error,value,addr) error = put_user(value,addr) |
| #define COPY_TO_USER(error,dest,src,size) error = copy_to_user(dest,src,size) ? -EFAULT : 0 |
| |
| #include <linux/uaccess.h> |
| |
| static MGSL_PARAMS default_params = { |
| MGSL_MODE_HDLC, /* unsigned long mode */ |
| 0, /* unsigned char loopback; */ |
| HDLC_FLAG_UNDERRUN_ABORT15, /* unsigned short flags; */ |
| HDLC_ENCODING_NRZI_SPACE, /* unsigned char encoding; */ |
| 0, /* unsigned long clock_speed; */ |
| 0xff, /* unsigned char addr_filter; */ |
| HDLC_CRC_16_CCITT, /* unsigned short crc_type; */ |
| HDLC_PREAMBLE_LENGTH_8BITS, /* unsigned char preamble_length; */ |
| HDLC_PREAMBLE_PATTERN_NONE, /* unsigned char preamble; */ |
| 9600, /* unsigned long data_rate; */ |
| 8, /* unsigned char data_bits; */ |
| 1, /* unsigned char stop_bits; */ |
| ASYNC_PARITY_NONE /* unsigned char parity; */ |
| }; |
| |
| /* size in bytes of DMA data buffers */ |
| #define SCABUFSIZE 1024 |
| #define SCA_MEM_SIZE 0x40000 |
| #define SCA_BASE_SIZE 512 |
| #define SCA_REG_SIZE 16 |
| #define SCA_MAX_PORTS 4 |
| #define SCAMAXDESC 128 |
| |
| #define BUFFERLISTSIZE 4096 |
| |
| /* SCA-I style DMA buffer descriptor */ |
| typedef struct _SCADESC |
| { |
| u16 next; /* lower l6 bits of next descriptor addr */ |
| u16 buf_ptr; /* lower 16 bits of buffer addr */ |
| u8 buf_base; /* upper 8 bits of buffer addr */ |
| u8 pad1; |
| u16 length; /* length of buffer */ |
| u8 status; /* status of buffer */ |
| u8 pad2; |
| } SCADESC, *PSCADESC; |
| |
| typedef struct _SCADESC_EX |
| { |
| /* device driver bookkeeping section */ |
| char *virt_addr; /* virtual address of data buffer */ |
| u16 phys_entry; /* lower 16-bits of physical address of this descriptor */ |
| } SCADESC_EX, *PSCADESC_EX; |
| |
| /* The queue of BH actions to be performed */ |
| |
| #define BH_RECEIVE 1 |
| #define BH_TRANSMIT 2 |
| #define BH_STATUS 4 |
| |
| #define IO_PIN_SHUTDOWN_LIMIT 100 |
| |
| struct _input_signal_events { |
| int ri_up; |
| int ri_down; |
| int dsr_up; |
| int dsr_down; |
| int dcd_up; |
| int dcd_down; |
| int cts_up; |
| int cts_down; |
| }; |
| |
| /* |
| * Device instance data structure |
| */ |
| typedef struct _synclinkmp_info { |
| void *if_ptr; /* General purpose pointer (used by SPPP) */ |
| int magic; |
| struct tty_port port; |
| int line; |
| unsigned short close_delay; |
| unsigned short closing_wait; /* time to wait before closing */ |
| |
| struct mgsl_icount icount; |
| |
| int timeout; |
| int x_char; /* xon/xoff character */ |
| u16 read_status_mask1; /* break detection (SR1 indications) */ |
| u16 read_status_mask2; /* parity/framing/overun (SR2 indications) */ |
| unsigned char ignore_status_mask1; /* break detection (SR1 indications) */ |
| unsigned char ignore_status_mask2; /* parity/framing/overun (SR2 indications) */ |
| unsigned char *tx_buf; |
| int tx_put; |
| int tx_get; |
| int tx_count; |
| |
| wait_queue_head_t status_event_wait_q; |
| wait_queue_head_t event_wait_q; |
| struct timer_list tx_timer; /* HDLC transmit timeout timer */ |
| struct _synclinkmp_info *next_device; /* device list link */ |
| struct timer_list status_timer; /* input signal status check timer */ |
| |
| spinlock_t lock; /* spinlock for synchronizing with ISR */ |
| struct work_struct task; /* task structure for scheduling bh */ |
| |
| u32 max_frame_size; /* as set by device config */ |
| |
| u32 pending_bh; |
| |
| bool bh_running; /* Protection from multiple */ |
| int isr_overflow; |
| bool bh_requested; |
| |
| int dcd_chkcount; /* check counts to prevent */ |
| int cts_chkcount; /* too many IRQs if a signal */ |
| int dsr_chkcount; /* is floating */ |
| int ri_chkcount; |
| |
| char *buffer_list; /* virtual address of Rx & Tx buffer lists */ |
| unsigned long buffer_list_phys; |
| |
| unsigned int rx_buf_count; /* count of total allocated Rx buffers */ |
| SCADESC *rx_buf_list; /* list of receive buffer entries */ |
| SCADESC_EX rx_buf_list_ex[SCAMAXDESC]; /* list of receive buffer entries */ |
| unsigned int current_rx_buf; |
| |
| unsigned int tx_buf_count; /* count of total allocated Tx buffers */ |
| SCADESC *tx_buf_list; /* list of transmit buffer entries */ |
| SCADESC_EX tx_buf_list_ex[SCAMAXDESC]; /* list of transmit buffer entries */ |
| unsigned int last_tx_buf; |
| |
| unsigned char *tmp_rx_buf; |
| unsigned int tmp_rx_buf_count; |
| |
| bool rx_enabled; |
| bool rx_overflow; |
| |
| bool tx_enabled; |
| bool tx_active; |
| u32 idle_mode; |
| |
| unsigned char ie0_value; |
| unsigned char ie1_value; |
| unsigned char ie2_value; |
| unsigned char ctrlreg_value; |
| unsigned char old_signals; |
| |
| char device_name[25]; /* device instance name */ |
| |
| int port_count; |
| int adapter_num; |
| int port_num; |
| |
| struct _synclinkmp_info *port_array[SCA_MAX_PORTS]; |
| |
| unsigned int bus_type; /* expansion bus type (ISA,EISA,PCI) */ |
| |
| unsigned int irq_level; /* interrupt level */ |
| unsigned long irq_flags; |
| bool irq_requested; /* true if IRQ requested */ |
| |
| MGSL_PARAMS params; /* communications parameters */ |
| |
| unsigned char serial_signals; /* current serial signal states */ |
| |
| bool irq_occurred; /* for diagnostics use */ |
| unsigned int init_error; /* Initialization startup error */ |
| |
| u32 last_mem_alloc; |
| unsigned char* memory_base; /* shared memory address (PCI only) */ |
| u32 phys_memory_base; |
| int shared_mem_requested; |
| |
| unsigned char* sca_base; /* HD64570 SCA Memory address */ |
| u32 phys_sca_base; |
| u32 sca_offset; |
| bool sca_base_requested; |
| |
| unsigned char* lcr_base; /* local config registers (PCI only) */ |
| u32 phys_lcr_base; |
| u32 lcr_offset; |
| int lcr_mem_requested; |
| |
| unsigned char* statctrl_base; /* status/control register memory */ |
| u32 phys_statctrl_base; |
| u32 statctrl_offset; |
| bool sca_statctrl_requested; |
| |
| u32 misc_ctrl_value; |
| char *flag_buf; |
| bool drop_rts_on_tx_done; |
| |
| struct _input_signal_events input_signal_events; |
| |
| /* SPPP/Cisco HDLC device parts */ |
| int netcount; |
| spinlock_t netlock; |
| |
| #if SYNCLINK_GENERIC_HDLC |
| struct net_device *netdev; |
| #endif |
| |
| } SLMP_INFO; |
| |
| #define MGSL_MAGIC 0x5401 |
| |
| /* |
| * define serial signal status change macros |
| */ |
| #define MISCSTATUS_DCD_LATCHED (SerialSignal_DCD<<8) /* indicates change in DCD */ |
| #define MISCSTATUS_RI_LATCHED (SerialSignal_RI<<8) /* indicates change in RI */ |
| #define MISCSTATUS_CTS_LATCHED (SerialSignal_CTS<<8) /* indicates change in CTS */ |
| #define MISCSTATUS_DSR_LATCHED (SerialSignal_DSR<<8) /* change in DSR */ |
| |
| /* Common Register macros */ |
| #define LPR 0x00 |
| #define PABR0 0x02 |
| #define PABR1 0x03 |
| #define WCRL 0x04 |
| #define WCRM 0x05 |
| #define WCRH 0x06 |
| #define DPCR 0x08 |
| #define DMER 0x09 |
| #define ISR0 0x10 |
| #define ISR1 0x11 |
| #define ISR2 0x12 |
| #define IER0 0x14 |
| #define IER1 0x15 |
| #define IER2 0x16 |
| #define ITCR 0x18 |
| #define INTVR 0x1a |
| #define IMVR 0x1c |
| |
| /* MSCI Register macros */ |
| #define TRB 0x20 |
| #define TRBL 0x20 |
| #define TRBH 0x21 |
| #define SR0 0x22 |
| #define SR1 0x23 |
| #define SR2 0x24 |
| #define SR3 0x25 |
| #define FST 0x26 |
| #define IE0 0x28 |
| #define IE1 0x29 |
| #define IE2 0x2a |
| #define FIE 0x2b |
| #define CMD 0x2c |
| #define MD0 0x2e |
| #define MD1 0x2f |
| #define MD2 0x30 |
| #define CTL 0x31 |
| #define SA0 0x32 |
| #define SA1 0x33 |
| #define IDL 0x34 |
| #define TMC 0x35 |
| #define RXS 0x36 |
| #define TXS 0x37 |
| #define TRC0 0x38 |
| #define TRC1 0x39 |
| #define RRC 0x3a |
| #define CST0 0x3c |
| #define CST1 0x3d |
| |
| /* Timer Register Macros */ |
| #define TCNT 0x60 |
| #define TCNTL 0x60 |
| #define TCNTH 0x61 |
| #define TCONR 0x62 |
| #define TCONRL 0x62 |
| #define TCONRH 0x63 |
| #define TMCS 0x64 |
| #define TEPR 0x65 |
| |
| /* DMA Controller Register macros */ |
| #define DARL 0x80 |
| #define DARH 0x81 |
| #define DARB 0x82 |
| #define BAR 0x80 |
| #define BARL 0x80 |
| #define BARH 0x81 |
| #define BARB 0x82 |
| #define SAR 0x84 |
| #define SARL 0x84 |
| #define SARH 0x85 |
| #define SARB 0x86 |
| #define CPB 0x86 |
| #define CDA 0x88 |
| #define CDAL 0x88 |
| #define CDAH 0x89 |
| #define EDA 0x8a |
| #define EDAL 0x8a |
| #define EDAH 0x8b |
| #define BFL 0x8c |
| #define BFLL 0x8c |
| #define BFLH 0x8d |
| #define BCR 0x8e |
| #define BCRL 0x8e |
| #define BCRH 0x8f |
| #define DSR 0x90 |
| #define DMR 0x91 |
| #define FCT 0x93 |
| #define DIR 0x94 |
| #define DCMD 0x95 |
| |
| /* combine with timer or DMA register address */ |
| #define TIMER0 0x00 |
| #define TIMER1 0x08 |
| #define TIMER2 0x10 |
| #define TIMER3 0x18 |
| #define RXDMA 0x00 |
| #define TXDMA 0x20 |
| |
| /* SCA Command Codes */ |
| #define NOOP 0x00 |
| #define TXRESET 0x01 |
| #define TXENABLE 0x02 |
| #define TXDISABLE 0x03 |
| #define TXCRCINIT 0x04 |
| #define TXCRCEXCL 0x05 |
| #define TXEOM 0x06 |
| #define TXABORT 0x07 |
| #define MPON 0x08 |
| #define TXBUFCLR 0x09 |
| #define RXRESET 0x11 |
| #define RXENABLE 0x12 |
| #define RXDISABLE 0x13 |
| #define RXCRCINIT 0x14 |
| #define RXREJECT 0x15 |
| #define SEARCHMP 0x16 |
| #define RXCRCEXCL 0x17 |
| #define RXCRCCALC 0x18 |
| #define CHRESET 0x21 |
| #define HUNT 0x31 |
| |
| /* DMA command codes */ |
| #define SWABORT 0x01 |
| #define FEICLEAR 0x02 |
| |
| /* IE0 */ |
| #define TXINTE BIT7 |
| #define RXINTE BIT6 |
| #define TXRDYE BIT1 |
| #define RXRDYE BIT0 |
| |
| /* IE1 & SR1 */ |
| #define UDRN BIT7 |
| #define IDLE BIT6 |
| #define SYNCD BIT4 |
| #define FLGD BIT4 |
| #define CCTS BIT3 |
| #define CDCD BIT2 |
| #define BRKD BIT1 |
| #define ABTD BIT1 |
| #define GAPD BIT1 |
| #define BRKE BIT0 |
| #define IDLD BIT0 |
| |
| /* IE2 & SR2 */ |
| #define EOM BIT7 |
| #define PMP BIT6 |
| #define SHRT BIT6 |
| #define PE BIT5 |
| #define ABT BIT5 |
| #define FRME BIT4 |
| #define RBIT BIT4 |
| #define OVRN BIT3 |
| #define CRCE BIT2 |
| |
| |
| /* |
| * Global linked list of SyncLink devices |
| */ |
| static SLMP_INFO *synclinkmp_device_list = NULL; |
| static int synclinkmp_adapter_count = -1; |
| static int synclinkmp_device_count = 0; |
| |
| /* |
| * Set this param to non-zero to load eax with the |
| * .text section address and breakpoint on module load. |
| * This is useful for use with gdb and add-symbol-file command. |
| */ |
| static bool break_on_load = 0; |
| |
| /* |
| * Driver major number, defaults to zero to get auto |
| * assigned major number. May be forced as module parameter. |
| */ |
| static int ttymajor = 0; |
| |
| /* |
| * Array of user specified options for ISA adapters. |
| */ |
| static int debug_level = 0; |
| static int maxframe[MAX_DEVICES] = {0,}; |
| |
| module_param(break_on_load, bool, 0); |
| module_param(ttymajor, int, 0); |
| module_param(debug_level, int, 0); |
| module_param_array(maxframe, int, NULL, 0); |
| |
| static char *driver_name = "SyncLink MultiPort driver"; |
| static char *driver_version = "$Revision: 4.38 $"; |
| |
| static int synclinkmp_init_one(struct pci_dev *dev,const struct pci_device_id *ent); |
| static void synclinkmp_remove_one(struct pci_dev *dev); |
| |
| static const struct pci_device_id synclinkmp_pci_tbl[] = { |
| { PCI_VENDOR_ID_MICROGATE, PCI_DEVICE_ID_MICROGATE_SCA, PCI_ANY_ID, PCI_ANY_ID, }, |
| { 0, }, /* terminate list */ |
| }; |
| MODULE_DEVICE_TABLE(pci, synclinkmp_pci_tbl); |
| |
| MODULE_LICENSE("GPL"); |
| |
| static struct pci_driver synclinkmp_pci_driver = { |
| .name = "synclinkmp", |
| .id_table = synclinkmp_pci_tbl, |
| .probe = synclinkmp_init_one, |
| .remove = synclinkmp_remove_one, |
| }; |
| |
| |
| static struct tty_driver *serial_driver; |
| |
| /* number of characters left in xmit buffer before we ask for more */ |
| #define WAKEUP_CHARS 256 |
| |
| |
| /* tty callbacks */ |
| |
| static int open(struct tty_struct *tty, struct file * filp); |
| static void close(struct tty_struct *tty, struct file * filp); |
| static void hangup(struct tty_struct *tty); |
| static void set_termios(struct tty_struct *tty, struct ktermios *old_termios); |
| |
| static int write(struct tty_struct *tty, const unsigned char *buf, int count); |
| static int put_char(struct tty_struct *tty, unsigned char ch); |
| static void send_xchar(struct tty_struct *tty, char ch); |
| static void wait_until_sent(struct tty_struct *tty, int timeout); |
| static int write_room(struct tty_struct *tty); |
| static void flush_chars(struct tty_struct *tty); |
| static void flush_buffer(struct tty_struct *tty); |
| static void tx_hold(struct tty_struct *tty); |
| static void tx_release(struct tty_struct *tty); |
| |
| static int ioctl(struct tty_struct *tty, unsigned int cmd, unsigned long arg); |
| static int chars_in_buffer(struct tty_struct *tty); |
| static void throttle(struct tty_struct * tty); |
| static void unthrottle(struct tty_struct * tty); |
| static int set_break(struct tty_struct *tty, int break_state); |
| |
| #if SYNCLINK_GENERIC_HDLC |
| #define dev_to_port(D) (dev_to_hdlc(D)->priv) |
| static void hdlcdev_tx_done(SLMP_INFO *info); |
| static void hdlcdev_rx(SLMP_INFO *info, char *buf, int size); |
| static int hdlcdev_init(SLMP_INFO *info); |
| static void hdlcdev_exit(SLMP_INFO *info); |
| #endif |
| |
| /* ioctl handlers */ |
| |
| static int get_stats(SLMP_INFO *info, struct mgsl_icount __user *user_icount); |
| static int get_params(SLMP_INFO *info, MGSL_PARAMS __user *params); |
| static int set_params(SLMP_INFO *info, MGSL_PARAMS __user *params); |
| static int get_txidle(SLMP_INFO *info, int __user *idle_mode); |
| static int set_txidle(SLMP_INFO *info, int idle_mode); |
| static int tx_enable(SLMP_INFO *info, int enable); |
| static int tx_abort(SLMP_INFO *info); |
| static int rx_enable(SLMP_INFO *info, int enable); |
| static int modem_input_wait(SLMP_INFO *info,int arg); |
| static int wait_mgsl_event(SLMP_INFO *info, int __user *mask_ptr); |
| static int tiocmget(struct tty_struct *tty); |
| static int tiocmset(struct tty_struct *tty, |
| unsigned int set, unsigned int clear); |
| static int set_break(struct tty_struct *tty, int break_state); |
| |
| static int add_device(SLMP_INFO *info); |
| static int device_init(int adapter_num, struct pci_dev *pdev); |
| static int claim_resources(SLMP_INFO *info); |
| static void release_resources(SLMP_INFO *info); |
| |
| static int startup(SLMP_INFO *info); |
| static int block_til_ready(struct tty_struct *tty, struct file * filp,SLMP_INFO *info); |
| static int carrier_raised(struct tty_port *port); |
| static void shutdown(SLMP_INFO *info); |
| static void program_hw(SLMP_INFO *info); |
| static void change_params(SLMP_INFO *info); |
| |
| static bool init_adapter(SLMP_INFO *info); |
| static bool register_test(SLMP_INFO *info); |
| static bool irq_test(SLMP_INFO *info); |
| static bool loopback_test(SLMP_INFO *info); |
| static int adapter_test(SLMP_INFO *info); |
| static bool memory_test(SLMP_INFO *info); |
| |
| static void reset_adapter(SLMP_INFO *info); |
| static void reset_port(SLMP_INFO *info); |
| static void async_mode(SLMP_INFO *info); |
| static void hdlc_mode(SLMP_INFO *info); |
| |
| static void rx_stop(SLMP_INFO *info); |
| static void rx_start(SLMP_INFO *info); |
| static void rx_reset_buffers(SLMP_INFO *info); |
| static void rx_free_frame_buffers(SLMP_INFO *info, unsigned int first, unsigned int last); |
| static bool rx_get_frame(SLMP_INFO *info); |
| |
| static void tx_start(SLMP_INFO *info); |
| static void tx_stop(SLMP_INFO *info); |
| static void tx_load_fifo(SLMP_INFO *info); |
| static void tx_set_idle(SLMP_INFO *info); |
| static void tx_load_dma_buffer(SLMP_INFO *info, const char *buf, unsigned int count); |
| |
| static void get_signals(SLMP_INFO *info); |
| static void set_signals(SLMP_INFO *info); |
| static void enable_loopback(SLMP_INFO *info, int enable); |
| static void set_rate(SLMP_INFO *info, u32 data_rate); |
| |
| static int bh_action(SLMP_INFO *info); |
| static void bh_handler(struct work_struct *work); |
| static void bh_receive(SLMP_INFO *info); |
| static void bh_transmit(SLMP_INFO *info); |
| static void bh_status(SLMP_INFO *info); |
| static void isr_timer(SLMP_INFO *info); |
| static void isr_rxint(SLMP_INFO *info); |
| static void isr_rxrdy(SLMP_INFO *info); |
| static void isr_txint(SLMP_INFO *info); |
| static void isr_txrdy(SLMP_INFO *info); |
| static void isr_rxdmaok(SLMP_INFO *info); |
| static void isr_rxdmaerror(SLMP_INFO *info); |
| static void isr_txdmaok(SLMP_INFO *info); |
| static void isr_txdmaerror(SLMP_INFO *info); |
| static void isr_io_pin(SLMP_INFO *info, u16 status); |
| |
| static int alloc_dma_bufs(SLMP_INFO *info); |
| static void free_dma_bufs(SLMP_INFO *info); |
| static int alloc_buf_list(SLMP_INFO *info); |
| static int alloc_frame_bufs(SLMP_INFO *info, SCADESC *list, SCADESC_EX *list_ex,int count); |
| static int alloc_tmp_rx_buf(SLMP_INFO *info); |
| static void free_tmp_rx_buf(SLMP_INFO *info); |
| |
| static void load_pci_memory(SLMP_INFO *info, char* dest, const char* src, unsigned short count); |
| static void trace_block(SLMP_INFO *info, const char* data, int count, int xmit); |
| static void tx_timeout(struct timer_list *t); |
| static void status_timeout(struct timer_list *t); |
| |
| static unsigned char read_reg(SLMP_INFO *info, unsigned char addr); |
| static void write_reg(SLMP_INFO *info, unsigned char addr, unsigned char val); |
| static u16 read_reg16(SLMP_INFO *info, unsigned char addr); |
| static void write_reg16(SLMP_INFO *info, unsigned char addr, u16 val); |
| static unsigned char read_status_reg(SLMP_INFO * info); |
| static void write_control_reg(SLMP_INFO * info); |
| |
| |
| static unsigned char rx_active_fifo_level = 16; // rx request FIFO activation level in bytes |
| static unsigned char tx_active_fifo_level = 16; // tx request FIFO activation level in bytes |
| static unsigned char tx_negate_fifo_level = 32; // tx request FIFO negation level in bytes |
| |
| static u32 misc_ctrl_value = 0x007e4040; |
| static u32 lcr1_brdr_value = 0x00800028; |
| |
| static u32 read_ahead_count = 8; |
| |
| /* DPCR, DMA Priority Control |
| * |
| * 07..05 Not used, must be 0 |
| * 04 BRC, bus release condition: 0=all transfers complete |
| * 1=release after 1 xfer on all channels |
| * 03 CCC, channel change condition: 0=every cycle |
| * 1=after each channel completes all xfers |
| * 02..00 PR<2..0>, priority 100=round robin |
| * |
| * 00000100 = 0x00 |
| */ |
| static unsigned char dma_priority = 0x04; |
| |
| // Number of bytes that can be written to shared RAM |
| // in a single write operation |
| static u32 sca_pci_load_interval = 64; |
| |
| /* |
| * 1st function defined in .text section. Calling this function in |
| * init_module() followed by a breakpoint allows a remote debugger |
| * (gdb) to get the .text address for the add-symbol-file command. |
| * This allows remote debugging of dynamically loadable modules. |
| */ |
| static void* synclinkmp_get_text_ptr(void); |
| static void* synclinkmp_get_text_ptr(void) {return synclinkmp_get_text_ptr;} |
| |
| static inline int sanity_check(SLMP_INFO *info, |
| char *name, const char *routine) |
| { |
| #ifdef SANITY_CHECK |
| static const char *badmagic = |
| "Warning: bad magic number for synclinkmp_struct (%s) in %s\n"; |
| static const char *badinfo = |
| "Warning: null synclinkmp_struct for (%s) in %s\n"; |
| |
| if (!info) { |
| printk(badinfo, name, routine); |
| return 1; |
| } |
| if (info->magic != MGSL_MAGIC) { |
| printk(badmagic, name, routine); |
| return 1; |
| } |
| #else |
| if (!info) |
| return 1; |
| #endif |
| return 0; |
| } |
| |
| /** |
| * line discipline callback wrappers |
| * |
| * The wrappers maintain line discipline references |
| * while calling into the line discipline. |
| * |
| * ldisc_receive_buf - pass receive data to line discipline |
| */ |
| |
| static void ldisc_receive_buf(struct tty_struct *tty, |
| const __u8 *data, char *flags, int count) |
| { |
| struct tty_ldisc *ld; |
| if (!tty) |
| return; |
| ld = tty_ldisc_ref(tty); |
| if (ld) { |
| if (ld->ops->receive_buf) |
| ld->ops->receive_buf(tty, data, flags, count); |
| tty_ldisc_deref(ld); |
| } |
| } |
| |
| /* tty callbacks */ |
| |
| static int install(struct tty_driver *driver, struct tty_struct *tty) |
| { |
| SLMP_INFO *info; |
| int line = tty->index; |
| |
| if (line >= synclinkmp_device_count) { |
| printk("%s(%d): open with invalid line #%d.\n", |
| __FILE__,__LINE__,line); |
| return -ENODEV; |
| } |
| |
| info = synclinkmp_device_list; |
| while (info && info->line != line) |
| info = info->next_device; |
| if (sanity_check(info, tty->name, "open")) |
| return -ENODEV; |
| if (info->init_error) { |
| printk("%s(%d):%s device is not allocated, init error=%d\n", |
| __FILE__, __LINE__, info->device_name, |
| info->init_error); |
| return -ENODEV; |
| } |
| |
| tty->driver_data = info; |
| |
| return tty_port_install(&info->port, driver, tty); |
| } |
| |
| /* Called when a port is opened. Init and enable port. |
| */ |
| static int open(struct tty_struct *tty, struct file *filp) |
| { |
| SLMP_INFO *info = tty->driver_data; |
| unsigned long flags; |
| int retval; |
| |
| info->port.tty = tty; |
| |
| if (debug_level >= DEBUG_LEVEL_INFO) |
| printk("%s(%d):%s open(), old ref count = %d\n", |
| __FILE__,__LINE__,tty->driver->name, info->port.count); |
| |
| info->port.low_latency = (info->port.flags & ASYNC_LOW_LATENCY) ? 1 : 0; |
| |
| spin_lock_irqsave(&info->netlock, flags); |
| if (info->netcount) { |
| retval = -EBUSY; |
| spin_unlock_irqrestore(&info->netlock, flags); |
| goto cleanup; |
| } |
| info->port.count++; |
| spin_unlock_irqrestore(&info->netlock, flags); |
| |
| if (info->port.count == 1) { |
| /* 1st open on this device, init hardware */ |
| retval = startup(info); |
| if (retval < 0) |
| goto cleanup; |
| } |
| |
| retval = block_til_ready(tty, filp, info); |
| if (retval) { |
| if (debug_level >= DEBUG_LEVEL_INFO) |
| printk("%s(%d):%s block_til_ready() returned %d\n", |
| __FILE__,__LINE__, info->device_name, retval); |
| goto cleanup; |
| } |
| |
| if (debug_level >= DEBUG_LEVEL_INFO) |
| printk("%s(%d):%s open() success\n", |
| __FILE__,__LINE__, info->device_name); |
| retval = 0; |
| |
| cleanup: |
| if (retval) { |
| if (tty->count == 1) |
| info->port.tty = NULL; /* tty layer will release tty struct */ |
| if(info->port.count) |
| info->port.count--; |
| } |
| |
| return retval; |
| } |
| |
| /* Called when port is closed. Wait for remaining data to be |
| * sent. Disable port and free resources. |
| */ |
| static void close(struct tty_struct *tty, struct file *filp) |
| { |
| SLMP_INFO * info = tty->driver_data; |
| |
| if (sanity_check(info, tty->name, "close")) |
| return; |
| |
| if (debug_level >= DEBUG_LEVEL_INFO) |
| printk("%s(%d):%s close() entry, count=%d\n", |
| __FILE__,__LINE__, info->device_name, info->port.count); |
| |
| if (tty_port_close_start(&info->port, tty, filp) == 0) |
| goto cleanup; |
| |
| mutex_lock(&info->port.mutex); |
| if (tty_port_initialized(&info->port)) |
| wait_until_sent(tty, info->timeout); |
| |
| flush_buffer(tty); |
| tty_ldisc_flush(tty); |
| shutdown(info); |
| mutex_unlock(&info->port.mutex); |
| |
| tty_port_close_end(&info->port, tty); |
| info->port.tty = NULL; |
| cleanup: |
| if (debug_level >= DEBUG_LEVEL_INFO) |
| printk("%s(%d):%s close() exit, count=%d\n", __FILE__,__LINE__, |
| tty->driver->name, info->port.count); |
| } |
| |
| /* Called by tty_hangup() when a hangup is signaled. |
| * This is the same as closing all open descriptors for the port. |
| */ |
| static void hangup(struct tty_struct *tty) |
| { |
| SLMP_INFO *info = tty->driver_data; |
| unsigned long flags; |
| |
| if (debug_level >= DEBUG_LEVEL_INFO) |
| printk("%s(%d):%s hangup()\n", |
| __FILE__,__LINE__, info->device_name ); |
| |
| if (sanity_check(info, tty->name, "hangup")) |
| return; |
| |
| mutex_lock(&info->port.mutex); |
| flush_buffer(tty); |
| shutdown(info); |
| |
| spin_lock_irqsave(&info->port.lock, flags); |
| info->port.count = 0; |
| info->port.tty = NULL; |
| spin_unlock_irqrestore(&info->port.lock, flags); |
| tty_port_set_active(&info->port, 1); |
| mutex_unlock(&info->port.mutex); |
| |
| wake_up_interruptible(&info->port.open_wait); |
| } |
| |
| /* Set new termios settings |
| */ |
| static void set_termios(struct tty_struct *tty, struct ktermios *old_termios) |
| { |
| SLMP_INFO *info = tty->driver_data; |
| unsigned long flags; |
| |
| if (debug_level >= DEBUG_LEVEL_INFO) |
| printk("%s(%d):%s set_termios()\n", __FILE__,__LINE__, |
| tty->driver->name ); |
| |
| change_params(info); |
| |
| /* Handle transition to B0 status */ |
| if ((old_termios->c_cflag & CBAUD) && !C_BAUD(tty)) { |
| info->serial_signals &= ~(SerialSignal_RTS | SerialSignal_DTR); |
| spin_lock_irqsave(&info->lock,flags); |
| set_signals(info); |
| spin_unlock_irqrestore(&info->lock,flags); |
| } |
| |
| /* Handle transition away from B0 status */ |
| if (!(old_termios->c_cflag & CBAUD) && C_BAUD(tty)) { |
| info->serial_signals |= SerialSignal_DTR; |
| if (!C_CRTSCTS(tty) || !tty_throttled(tty)) |
| info->serial_signals |= SerialSignal_RTS; |
| spin_lock_irqsave(&info->lock,flags); |
| set_signals(info); |
| spin_unlock_irqrestore(&info->lock,flags); |
| } |
| |
| /* Handle turning off CRTSCTS */ |
| if (old_termios->c_cflag & CRTSCTS && !C_CRTSCTS(tty)) { |
| tty->hw_stopped = 0; |
| tx_release(tty); |
| } |
| } |
| |
| /* Send a block of data |
| * |
| * Arguments: |
| * |
| * tty pointer to tty information structure |
| * buf pointer to buffer containing send data |
| * count size of send data in bytes |
| * |
| * Return Value: number of characters written |
| */ |
| static int write(struct tty_struct *tty, |
| const unsigned char *buf, int count) |
| { |
| int c, ret = 0; |
| SLMP_INFO *info = tty->driver_data; |
| unsigned long flags; |
| |
| if (debug_level >= DEBUG_LEVEL_INFO) |
| printk("%s(%d):%s write() count=%d\n", |
| __FILE__,__LINE__,info->device_name,count); |
| |
| if (sanity_check(info, tty->name, "write")) |
| goto cleanup; |
| |
| if (!info->tx_buf) |
| goto cleanup; |
| |
| if (info->params.mode == MGSL_MODE_HDLC) { |
| if (count > info->max_frame_size) { |
| ret = -EIO; |
| goto cleanup; |
| } |
| if (info->tx_active) |
| goto cleanup; |
| if (info->tx_count) { |
| /* send accumulated data from send_char() calls */ |
| /* as frame and wait before accepting more data. */ |
| tx_load_dma_buffer(info, info->tx_buf, info->tx_count); |
| goto start; |
| } |
| ret = info->tx_count = count; |
| tx_load_dma_buffer(info, buf, count); |
| goto start; |
| } |
| |
| for (;;) { |
| c = min_t(int, count, |
| min(info->max_frame_size - info->tx_count - 1, |
| info->max_frame_size - info->tx_put)); |
| if (c <= 0) |
| break; |
| |
| memcpy(info->tx_buf + info->tx_put, buf, c); |
| |
| spin_lock_irqsave(&info->lock,flags); |
| info->tx_put += c; |
| if (info->tx_put >= info->max_frame_size) |
| info->tx_put -= info->max_frame_size; |
| info->tx_count += c; |
| spin_unlock_irqrestore(&info->lock,flags); |
| |
| buf += c; |
| count -= c; |
| ret += c; |
| } |
| |
| if (info->params.mode == MGSL_MODE_HDLC) { |
| if (count) { |
| ret = info->tx_count = 0; |
| goto cleanup; |
| } |
| tx_load_dma_buffer(info, info->tx_buf, info->tx_count); |
| } |
| start: |
| if (info->tx_count && !tty->stopped && !tty->hw_stopped) { |
| spin_lock_irqsave(&info->lock,flags); |
| if (!info->tx_active) |
| tx_start(info); |
| spin_unlock_irqrestore(&info->lock,flags); |
| } |
| |
| cleanup: |
| if (debug_level >= DEBUG_LEVEL_INFO) |
| printk( "%s(%d):%s write() returning=%d\n", |
| __FILE__,__LINE__,info->device_name,ret); |
| return ret; |
| } |
| |
| /* Add a character to the transmit buffer. |
| */ |
| static int put_char(struct tty_struct *tty, unsigned char ch) |
| { |
| SLMP_INFO *info = tty->driver_data; |
| unsigned long flags; |
| int ret = 0; |
| |
| if ( debug_level >= DEBUG_LEVEL_INFO ) { |
| printk( "%s(%d):%s put_char(%d)\n", |
| __FILE__,__LINE__,info->device_name,ch); |
| } |
| |
| if (sanity_check(info, tty->name, "put_char")) |
| return 0; |
| |
| if (!info->tx_buf) |
| return 0; |
| |
| spin_lock_irqsave(&info->lock,flags); |
| |
| if ( (info->params.mode != MGSL_MODE_HDLC) || |
| !info->tx_active ) { |
| |
| if (info->tx_count < info->max_frame_size - 1) { |
| info->tx_buf[info->tx_put++] = ch; |
| if (info->tx_put >= info->max_frame_size) |
| info->tx_put -= info->max_frame_size; |
| info->tx_count++; |
| ret = 1; |
| } |
| } |
| |
| spin_unlock_irqrestore(&info->lock,flags); |
| return ret; |
| } |
| |
| /* Send a high-priority XON/XOFF character |
| */ |
| static void send_xchar(struct tty_struct *tty, char ch) |
| { |
| SLMP_INFO *info = tty->driver_data; |
| unsigned long flags; |
| |
| if (debug_level >= DEBUG_LEVEL_INFO) |
| printk("%s(%d):%s send_xchar(%d)\n", |
| __FILE__,__LINE__, info->device_name, ch ); |
| |
| if (sanity_check(info, tty->name, "send_xchar")) |
| return; |
| |
| info->x_char = ch; |
| if (ch) { |
| /* Make sure transmit interrupts are on */ |
| spin_lock_irqsave(&info->lock,flags); |
| if (!info->tx_enabled) |
| tx_start(info); |
| spin_unlock_irqrestore(&info->lock,flags); |
| } |
| } |
| |
| /* Wait until the transmitter is empty. |
| */ |
| static void wait_until_sent(struct tty_struct *tty, int timeout) |
| { |
| SLMP_INFO * info = tty->driver_data; |
| unsigned long orig_jiffies, char_time; |
| |
| if (!info ) |
| return; |
| |
| if (debug_level >= DEBUG_LEVEL_INFO) |
| printk("%s(%d):%s wait_until_sent() entry\n", |
| __FILE__,__LINE__, info->device_name ); |
| |
| if (sanity_check(info, tty->name, "wait_until_sent")) |
| return; |
| |
| if (!tty_port_initialized(&info->port)) |
| goto exit; |
| |
| orig_jiffies = jiffies; |
| |
| /* Set check interval to 1/5 of estimated time to |
| * send a character, and make it at least 1. The check |
| * interval should also be less than the timeout. |
| * Note: use tight timings here to satisfy the NIST-PCTS. |
| */ |
| |
| if ( info->params.data_rate ) { |
| char_time = info->timeout/(32 * 5); |
| if (!char_time) |
| char_time++; |
| } else |
| char_time = 1; |
| |
| if (timeout) |
| char_time = min_t(unsigned long, char_time, timeout); |
| |
| if ( info->params.mode == MGSL_MODE_HDLC ) { |
| while (info->tx_active) { |
| msleep_interruptible(jiffies_to_msecs(char_time)); |
| if (signal_pending(current)) |
| break; |
| if (timeout && time_after(jiffies, orig_jiffies + timeout)) |
| break; |
| } |
| } else { |
| /* |
| * TODO: determine if there is something similar to USC16C32 |
| * TXSTATUS_ALL_SENT status |
| */ |
| while ( info->tx_active && info->tx_enabled) { |
| msleep_interruptible(jiffies_to_msecs(char_time)); |
| if (signal_pending(current)) |
| break; |
| if (timeout && time_after(jiffies, orig_jiffies + timeout)) |
| break; |
| } |
| } |
| |
| exit: |
| if (debug_level >= DEBUG_LEVEL_INFO) |
| printk("%s(%d):%s wait_until_sent() exit\n", |
| __FILE__,__LINE__, info->device_name ); |
| } |
| |
| /* Return the count of free bytes in transmit buffer |
| */ |
| static int write_room(struct tty_struct *tty) |
| { |
| SLMP_INFO *info = tty->driver_data; |
| int ret; |
| |
| if (sanity_check(info, tty->name, "write_room")) |
| return 0; |
| |
| if (info->params.mode == MGSL_MODE_HDLC) { |
| ret = (info->tx_active) ? 0 : HDLC_MAX_FRAME_SIZE; |
| } else { |
| ret = info->max_frame_size - info->tx_count - 1; |
| if (ret < 0) |
| ret = 0; |
| } |
| |
| if (debug_level >= DEBUG_LEVEL_INFO) |
| printk("%s(%d):%s write_room()=%d\n", |
| __FILE__, __LINE__, info->device_name, ret); |
| |
| return ret; |
| } |
| |
| /* enable transmitter and send remaining buffered characters |
| */ |
| static void flush_chars(struct tty_struct *tty) |
| { |
| SLMP_INFO *info = tty->driver_data; |
| unsigned long flags; |
| |
| if ( debug_level >= DEBUG_LEVEL_INFO ) |
| printk( "%s(%d):%s flush_chars() entry tx_count=%d\n", |
| __FILE__,__LINE__,info->device_name,info->tx_count); |
| |
| if (sanity_check(info, tty->name, "flush_chars")) |
| return; |
| |
| if (info->tx_count <= 0 || tty->stopped || tty->hw_stopped || |
| !info->tx_buf) |
| return; |
| |
| if ( debug_level >= DEBUG_LEVEL_INFO ) |
| printk( "%s(%d):%s flush_chars() entry, starting transmitter\n", |
| __FILE__,__LINE__,info->device_name ); |
| |
| spin_lock_irqsave(&info->lock,flags); |
| |
| if (!info->tx_active) { |
| if ( (info->params.mode == MGSL_MODE_HDLC) && |
| info->tx_count ) { |
| /* operating in synchronous (frame oriented) mode */ |
| /* copy data from circular tx_buf to */ |
| /* transmit DMA buffer. */ |
| tx_load_dma_buffer(info, |
| info->tx_buf,info->tx_count); |
| } |
| tx_start(info); |
| } |
| |
| spin_unlock_irqrestore(&info->lock,flags); |
| } |
| |
| /* Discard all data in the send buffer |
| */ |
| static void flush_buffer(struct tty_struct *tty) |
| { |
| SLMP_INFO *info = tty->driver_data; |
| unsigned long flags; |
| |
| if (debug_level >= DEBUG_LEVEL_INFO) |
| printk("%s(%d):%s flush_buffer() entry\n", |
| __FILE__,__LINE__, info->device_name ); |
| |
| if (sanity_check(info, tty->name, "flush_buffer")) |
| return; |
| |
| spin_lock_irqsave(&info->lock,flags); |
| info->tx_count = info->tx_put = info->tx_get = 0; |
| del_timer(&info->tx_timer); |
| spin_unlock_irqrestore(&info->lock,flags); |
| |
| tty_wakeup(tty); |
| } |
| |
| /* throttle (stop) transmitter |
| */ |
| static void tx_hold(struct tty_struct *tty) |
| { |
| SLMP_INFO *info = tty->driver_data; |
| unsigned long flags; |
| |
| if (sanity_check(info, tty->name, "tx_hold")) |
| return; |
| |
| if ( debug_level >= DEBUG_LEVEL_INFO ) |
| printk("%s(%d):%s tx_hold()\n", |
| __FILE__,__LINE__,info->device_name); |
| |
| spin_lock_irqsave(&info->lock,flags); |
| if (info->tx_enabled) |
| tx_stop(info); |
| spin_unlock_irqrestore(&info->lock,flags); |
| } |
| |
| /* release (start) transmitter |
| */ |
| static void tx_release(struct tty_struct *tty) |
| { |
| SLMP_INFO *info = tty->driver_data; |
| unsigned long flags; |
| |
| if (sanity_check(info, tty->name, "tx_release")) |
| return; |
| |
| if ( debug_level >= DEBUG_LEVEL_INFO ) |
| printk("%s(%d):%s tx_release()\n", |
| __FILE__,__LINE__,info->device_name); |
| |
| spin_lock_irqsave(&info->lock,flags); |
| if (!info->tx_enabled) |
| tx_start(info); |
| spin_unlock_irqrestore(&info->lock,flags); |
| } |
| |
| /* Service an IOCTL request |
| * |
| * Arguments: |
| * |
| * tty pointer to tty instance data |
| * cmd IOCTL command code |
| * arg command argument/context |
| * |
| * Return Value: 0 if success, otherwise error code |
| */ |
| static int ioctl(struct tty_struct *tty, |
| unsigned int cmd, unsigned long arg) |
| { |
| SLMP_INFO *info = tty->driver_data; |
| void __user *argp = (void __user *)arg; |
| |
| if (debug_level >= DEBUG_LEVEL_INFO) |
| printk("%s(%d):%s ioctl() cmd=%08X\n", __FILE__,__LINE__, |
| info->device_name, cmd ); |
| |
| if (sanity_check(info, tty->name, "ioctl")) |
| return -ENODEV; |
| |
| if (cmd != TIOCMIWAIT) { |
| if (tty_io_error(tty)) |
| return -EIO; |
| } |
| |
| switch (cmd) { |
| case MGSL_IOCGPARAMS: |
| return get_params(info, argp); |
| case MGSL_IOCSPARAMS: |
| return set_params(info, argp); |
| case MGSL_IOCGTXIDLE: |
| return get_txidle(info, argp); |
| case MGSL_IOCSTXIDLE: |
| return set_txidle(info, (int)arg); |
| case MGSL_IOCTXENABLE: |
| return tx_enable(info, (int)arg); |
| case MGSL_IOCRXENABLE: |
| return rx_enable(info, (int)arg); |
| case MGSL_IOCTXABORT: |
| return tx_abort(info); |
| case MGSL_IOCGSTATS: |
| return get_stats(info, argp); |
| case MGSL_IOCWAITEVENT: |
| return wait_mgsl_event(info, argp); |
| case MGSL_IOCLOOPTXDONE: |
| return 0; // TODO: Not supported, need to document |
| /* Wait for modem input (DCD,RI,DSR,CTS) change |
| * as specified by mask in arg (TIOCM_RNG/DSR/CD/CTS) |
| */ |
| case TIOCMIWAIT: |
| return modem_input_wait(info,(int)arg); |
| |
| /* |
| * Get counter of input serial line interrupts (DCD,RI,DSR,CTS) |
| * Return: write counters to the user passed counter struct |
| * NB: both 1->0 and 0->1 transitions are counted except for |
| * RI where only 0->1 is counted. |
| */ |
| default: |
| return -ENOIOCTLCMD; |
| } |
| return 0; |
| } |
| |
| static int get_icount(struct tty_struct *tty, |
| struct serial_icounter_struct *icount) |
| { |
| SLMP_INFO *info = tty->driver_data; |
| struct mgsl_icount cnow; /* kernel counter temps */ |
| unsigned long flags; |
| |
| spin_lock_irqsave(&info->lock,flags); |
| cnow = info->icount; |
| spin_unlock_irqrestore(&info->lock,flags); |
| |
| icount->cts = cnow.cts; |
| icount->dsr = cnow.dsr; |
| icount->rng = cnow.rng; |
| icount->dcd = cnow.dcd; |
| icount->rx = cnow.rx; |
| icount->tx = cnow.tx; |
| icount->frame = cnow.frame; |
| icount->overrun = cnow.overrun; |
| icount->parity = cnow.parity; |
| icount->brk = cnow.brk; |
| icount->buf_overrun = cnow.buf_overrun; |
| |
| return 0; |
| } |
| |
| /* |
| * /proc fs routines.... |
| */ |
| |
| static inline void line_info(struct seq_file *m, SLMP_INFO *info) |
| { |
| char stat_buf[30]; |
| unsigned long flags; |
| |
| seq_printf(m, "%s: SCABase=%08x Mem=%08X StatusControl=%08x LCR=%08X\n" |
| "\tIRQ=%d MaxFrameSize=%u\n", |
| info->device_name, |
| info->phys_sca_base, |
| info->phys_memory_base, |
| info->phys_statctrl_base, |
| info->phys_lcr_base, |
| info->irq_level, |
| info->max_frame_size ); |
| |
| /* output current serial signal states */ |
| spin_lock_irqsave(&info->lock,flags); |
| get_signals(info); |
| spin_unlock_irqrestore(&info->lock,flags); |
| |
| stat_buf[0] = 0; |
| stat_buf[1] = 0; |
| if (info->serial_signals & SerialSignal_RTS) |
| strcat(stat_buf, "|RTS"); |
| if (info->serial_signals & SerialSignal_CTS) |
| strcat(stat_buf, "|CTS"); |
| if (info->serial_signals & SerialSignal_DTR) |
| strcat(stat_buf, "|DTR"); |
| if (info->serial_signals & SerialSignal_DSR) |
| strcat(stat_buf, "|DSR"); |
| if (info->serial_signals & SerialSignal_DCD) |
| strcat(stat_buf, "|CD"); |
| if (info->serial_signals & SerialSignal_RI) |
| strcat(stat_buf, "|RI"); |
| |
| if (info->params.mode == MGSL_MODE_HDLC) { |
| seq_printf(m, "\tHDLC txok:%d rxok:%d", |
| info->icount.txok, info->icount.rxok); |
| if (info->icount.txunder) |
| seq_printf(m, " txunder:%d", info->icount.txunder); |
| if (info->icount.txabort) |
| seq_printf(m, " txabort:%d", info->icount.txabort); |
| if (info->icount.rxshort) |
| seq_printf(m, " rxshort:%d", info->icount.rxshort); |
| if (info->icount.rxlong) |
| seq_printf(m, " rxlong:%d", info->icount.rxlong); |
| if (info->icount.rxover) |
| seq_printf(m, " rxover:%d", info->icount.rxover); |
| if (info->icount.rxcrc) |
| seq_printf(m, " rxlong:%d", info->icount.rxcrc); |
| } else { |
| seq_printf(m, "\tASYNC tx:%d rx:%d", |
| info->icount.tx, info->icount.rx); |
| if (info->icount.frame) |
| seq_printf(m, " fe:%d", info->icount.frame); |
| if (info->icount.parity) |
| seq_printf(m, " pe:%d", info->icount.parity); |
| if (info->icount.brk) |
| seq_printf(m, " brk:%d", info->icount.brk); |
| if (info->icount.overrun) |
| seq_printf(m, " oe:%d", info->icount.overrun); |
| } |
| |
| /* Append serial signal status to end */ |
| seq_printf(m, " %s\n", stat_buf+1); |
| |
| seq_printf(m, "\ttxactive=%d bh_req=%d bh_run=%d pending_bh=%x\n", |
| info->tx_active,info->bh_requested,info->bh_running, |
| info->pending_bh); |
| } |
| |
| /* Called to print information about devices |
| */ |
| static int synclinkmp_proc_show(struct seq_file *m, void *v) |
| { |
| SLMP_INFO *info; |
| |
| seq_printf(m, "synclinkmp driver:%s\n", driver_version); |
| |
| info = synclinkmp_device_list; |
| while( info ) { |
| line_info(m, info); |
| info = info->next_device; |
| } |
| return 0; |
| } |
| |
| /* Return the count of bytes in transmit buffer |
| */ |
| static int chars_in_buffer(struct tty_struct *tty) |
| { |
| SLMP_INFO *info = tty->driver_data; |
| |
| if (sanity_check(info, tty->name, "chars_in_buffer")) |
| return 0; |
| |
| if (debug_level >= DEBUG_LEVEL_INFO) |
| printk("%s(%d):%s chars_in_buffer()=%d\n", |
| __FILE__, __LINE__, info->device_name, info->tx_count); |
| |
| return info->tx_count; |
| } |
| |
| /* Signal remote device to throttle send data (our receive data) |
| */ |
| static void throttle(struct tty_struct * tty) |
| { |
| SLMP_INFO *info = tty->driver_data; |
| unsigned long flags; |
| |
| if (debug_level >= DEBUG_LEVEL_INFO) |
| printk("%s(%d):%s throttle() entry\n", |
| __FILE__,__LINE__, info->device_name ); |
| |
| if (sanity_check(info, tty->name, "throttle")) |
| return; |
| |
| if (I_IXOFF(tty)) |
| send_xchar(tty, STOP_CHAR(tty)); |
| |
| if (C_CRTSCTS(tty)) { |
| spin_lock_irqsave(&info->lock,flags); |
| info->serial_signals &= ~SerialSignal_RTS; |
| set_signals(info); |
| spin_unlock_irqrestore(&info->lock,flags); |
| } |
| } |
| |
| /* Signal remote device to stop throttling send data (our receive data) |
| */ |
| static void unthrottle(struct tty_struct * tty) |
| { |
| SLMP_INFO *info = tty->driver_data; |
| unsigned long flags; |
| |
| if (debug_level >= DEBUG_LEVEL_INFO) |
| printk("%s(%d):%s unthrottle() entry\n", |
| __FILE__,__LINE__, info->device_name ); |
| |
| if (sanity_check(info, tty->name, "unthrottle")) |
| return; |
| |
| if (I_IXOFF(tty)) { |
| if (info->x_char) |
| info->x_char = 0; |
| else |
| send_xchar(tty, START_CHAR(tty)); |
| } |
| |
| if (C_CRTSCTS(tty)) { |
| spin_lock_irqsave(&info->lock,flags); |
| info->serial_signals |= SerialSignal_RTS; |
| set_signals(info); |
| spin_unlock_irqrestore(&info->lock,flags); |
| } |
| } |
| |
| /* set or clear transmit break condition |
| * break_state -1=set break condition, 0=clear |
| */ |
| static int set_break(struct tty_struct *tty, int break_state) |
| { |
| unsigned char RegValue; |
| SLMP_INFO * info = tty->driver_data; |
| unsigned long flags; |
| |
| if (debug_level >= DEBUG_LEVEL_INFO) |
| printk("%s(%d):%s set_break(%d)\n", |
| __FILE__,__LINE__, info->device_name, break_state); |
| |
| if (sanity_check(info, tty->name, "set_break")) |
| return -EINVAL; |
| |
| spin_lock_irqsave(&info->lock,flags); |
| RegValue = read_reg(info, CTL); |
| if (break_state == -1) |
| RegValue |= BIT3; |
| else |
| RegValue &= ~BIT3; |
| write_reg(info, CTL, RegValue); |
| spin_unlock_irqrestore(&info->lock,flags); |
| return 0; |
| } |
| |
| #if SYNCLINK_GENERIC_HDLC |
| |
| /** |
| * called by generic HDLC layer when protocol selected (PPP, frame relay, etc.) |
| * set encoding and frame check sequence (FCS) options |
| * |
| * dev pointer to network device structure |
| * encoding serial encoding setting |
| * parity FCS setting |
| * |
| * returns 0 if success, otherwise error code |
| */ |
| static int hdlcdev_attach(struct net_device *dev, unsigned short encoding, |
| unsigned short parity) |
| { |
| SLMP_INFO *info = dev_to_port(dev); |
| unsigned char new_encoding; |
| unsigned short new_crctype; |
| |
| /* return error if TTY interface open */ |
| if (info->port.count) |
| return -EBUSY; |
| |
| switch (encoding) |
| { |
| case ENCODING_NRZ: new_encoding = HDLC_ENCODING_NRZ; break; |
| case ENCODING_NRZI: new_encoding = HDLC_ENCODING_NRZI_SPACE; break; |
| case ENCODING_FM_MARK: new_encoding = HDLC_ENCODING_BIPHASE_MARK; break; |
| case ENCODING_FM_SPACE: new_encoding = HDLC_ENCODING_BIPHASE_SPACE; break; |
| case ENCODING_MANCHESTER: new_encoding = HDLC_ENCODING_BIPHASE_LEVEL; break; |
| default: return -EINVAL; |
| } |
| |
| switch (parity) |
| { |
| case PARITY_NONE: new_crctype = HDLC_CRC_NONE; break; |
| case PARITY_CRC16_PR1_CCITT: new_crctype = HDLC_CRC_16_CCITT; break; |
| case PARITY_CRC32_PR1_CCITT: new_crctype = HDLC_CRC_32_CCITT; break; |
| default: return -EINVAL; |
| } |
| |
| info->params.encoding = new_encoding; |
| info->params.crc_type = new_crctype; |
| |
| /* if network interface up, reprogram hardware */ |
| if (info->netcount) |
| program_hw(info); |
| |
| return 0; |
| } |
| |
| /** |
| * called by generic HDLC layer to send frame |
| * |
| * skb socket buffer containing HDLC frame |
| * dev pointer to network device structure |
| */ |
| static netdev_tx_t hdlcdev_xmit(struct sk_buff *skb, |
| struct net_device *dev) |
| { |
| SLMP_INFO *info = dev_to_port(dev); |
| unsigned long flags; |
| |
| if (debug_level >= DEBUG_LEVEL_INFO) |
| printk(KERN_INFO "%s:hdlc_xmit(%s)\n",__FILE__,dev->name); |
| |
| /* stop sending until this frame completes */ |
| netif_stop_queue(dev); |
| |
| /* copy data to device buffers */ |
| info->tx_count = skb->len; |
| tx_load_dma_buffer(info, skb->data, skb->len); |
| |
| /* update network statistics */ |
| dev->stats.tx_packets++; |
| dev->stats.tx_bytes += skb->len; |
| |
| /* done with socket buffer, so free it */ |
| dev_kfree_skb(skb); |
| |
| /* save start time for transmit timeout detection */ |
| netif_trans_update(dev); |
| |
| /* start hardware transmitter if necessary */ |
| spin_lock_irqsave(&info->lock,flags); |
| if (!info->tx_active) |
| tx_start(info); |
| spin_unlock_irqrestore(&info->lock,flags); |
| |
| return NETDEV_TX_OK; |
| } |
| |
| /** |
| * called by network layer when interface enabled |
| * claim resources and initialize hardware |
| * |
| * dev pointer to network device structure |
| * |
| * returns 0 if success, otherwise error code |
| */ |
| static int hdlcdev_open(struct net_device *dev) |
| { |
| SLMP_INFO *info = dev_to_port(dev); |
| int rc; |
| unsigned long flags; |
| |
| if (debug_level >= DEBUG_LEVEL_INFO) |
| printk("%s:hdlcdev_open(%s)\n",__FILE__,dev->name); |
| |
| /* generic HDLC layer open processing */ |
| rc = hdlc_open(dev); |
| if (rc) |
| return rc; |
| |
| /* arbitrate between network and tty opens */ |
| spin_lock_irqsave(&info->netlock, flags); |
| if (info->port.count != 0 || info->netcount != 0) { |
| printk(KERN_WARNING "%s: hdlc_open returning busy\n", dev->name); |
| spin_unlock_irqrestore(&info->netlock, flags); |
| return -EBUSY; |
| } |
| info->netcount=1; |
| spin_unlock_irqrestore(&info->netlock, flags); |
| |
| /* claim resources and init adapter */ |
| if ((rc = startup(info)) != 0) { |
| spin_lock_irqsave(&info->netlock, flags); |
| info->netcount=0; |
| spin_unlock_irqrestore(&info->netlock, flags); |
| return rc; |
| } |
| |
| /* assert RTS and DTR, apply hardware settings */ |
| info->serial_signals |= SerialSignal_RTS | SerialSignal_DTR; |
| program_hw(info); |
| |
| /* enable network layer transmit */ |
| netif_trans_update(dev); |
| netif_start_queue(dev); |
| |
| /* inform generic HDLC layer of current DCD status */ |
| spin_lock_irqsave(&info->lock, flags); |
| get_signals(info); |
| spin_unlock_irqrestore(&info->lock, flags); |
| if (info->serial_signals & SerialSignal_DCD) |
| netif_carrier_on(dev); |
| else |
| netif_carrier_off(dev); |
| return 0; |
| } |
| |
| /** |
| * called by network layer when interface is disabled |
| * shutdown hardware and release resources |
| * |
| * dev pointer to network device structure |
| * |
| * returns 0 if success, otherwise error code |
| */ |
| static int hdlcdev_close(struct net_device *dev) |
| { |
| SLMP_INFO *info = dev_to_port(dev); |
| unsigned long flags; |
| |
| if (debug_level >= DEBUG_LEVEL_INFO) |
| printk("%s:hdlcdev_close(%s)\n",__FILE__,dev->name); |
| |
| netif_stop_queue(dev); |
| |
| /* shutdown adapter and release resources */ |
| shutdown(info); |
| |
| hdlc_close(dev); |
| |
| spin_lock_irqsave(&info->netlock, flags); |
| info->netcount=0; |
| spin_unlock_irqrestore(&info->netlock, flags); |
| |
| return 0; |
| } |
| |
| /** |
| * called by network layer to process IOCTL call to network device |
| * |
| * dev pointer to network device structure |
| * ifr pointer to network interface request structure |
| * cmd IOCTL command code |
| * |
| * returns 0 if success, otherwise error code |
| */ |
| static int hdlcdev_ioctl(struct net_device *dev, struct ifreq *ifr, int cmd) |
| { |
| const size_t size = sizeof(sync_serial_settings); |
| sync_serial_settings new_line; |
| sync_serial_settings __user *line = ifr->ifr_settings.ifs_ifsu.sync; |
| SLMP_INFO *info = dev_to_port(dev); |
| unsigned int flags; |
| |
| if (debug_level >= DEBUG_LEVEL_INFO) |
| printk("%s:hdlcdev_ioctl(%s)\n",__FILE__,dev->name); |
| |
| /* return error if TTY interface open */ |
| if (info->port.count) |
| return -EBUSY; |
| |
| if (cmd != SIOCWANDEV) |
| return hdlc_ioctl(dev, ifr, cmd); |
| |
| switch(ifr->ifr_settings.type) { |
| case IF_GET_IFACE: /* return current sync_serial_settings */ |
| |
| ifr->ifr_settings.type = IF_IFACE_SYNC_SERIAL; |
| if (ifr->ifr_settings.size < size) { |
| ifr->ifr_settings.size = size; /* data size wanted */ |
| return -ENOBUFS; |
| } |
| |
| flags = info->params.flags & (HDLC_FLAG_RXC_RXCPIN | HDLC_FLAG_RXC_DPLL | |
| HDLC_FLAG_RXC_BRG | HDLC_FLAG_RXC_TXCPIN | |
| HDLC_FLAG_TXC_TXCPIN | HDLC_FLAG_TXC_DPLL | |
| HDLC_FLAG_TXC_BRG | HDLC_FLAG_TXC_RXCPIN); |
| |
| memset(&new_line, 0, sizeof(new_line)); |
| switch (flags){ |
| case (HDLC_FLAG_RXC_RXCPIN | HDLC_FLAG_TXC_TXCPIN): new_line.clock_type = CLOCK_EXT; break; |
| case (HDLC_FLAG_RXC_BRG | HDLC_FLAG_TXC_BRG): new_line.clock_type = CLOCK_INT; break; |
| case (HDLC_FLAG_RXC_RXCPIN | HDLC_FLAG_TXC_BRG): new_line.clock_type = CLOCK_TXINT; break; |
| case (HDLC_FLAG_RXC_RXCPIN | HDLC_FLAG_TXC_RXCPIN): new_line.clock_type = CLOCK_TXFROMRX; break; |
| default: new_line.clock_type = CLOCK_DEFAULT; |
| } |
| |
| new_line.clock_rate = info->params.clock_speed; |
| new_line.loopback = info->params.loopback ? 1:0; |
| |
| if (copy_to_user(line, &new_line, size)) |
| return -EFAULT; |
| return 0; |
| |
| case IF_IFACE_SYNC_SERIAL: /* set sync_serial_settings */ |
| |
| if(!capable(CAP_NET_ADMIN)) |
| return -EPERM; |
| if (copy_from_user(&new_line, line, size)) |
| return -EFAULT; |
| |
| switch (new_line.clock_type) |
| { |
| case CLOCK_EXT: flags = HDLC_FLAG_RXC_RXCPIN | HDLC_FLAG_TXC_TXCPIN; break; |
| case CLOCK_TXFROMRX: flags = HDLC_FLAG_RXC_RXCPIN | HDLC_FLAG_TXC_RXCPIN; break; |
| case CLOCK_INT: flags = HDLC_FLAG_RXC_BRG | HDLC_FLAG_TXC_BRG; break; |
| case CLOCK_TXINT: flags = HDLC_FLAG_RXC_RXCPIN | HDLC_FLAG_TXC_BRG; break; |
| case CLOCK_DEFAULT: flags = info->params.flags & |
| (HDLC_FLAG_RXC_RXCPIN | HDLC_FLAG_RXC_DPLL | |
| HDLC_FLAG_RXC_BRG | HDLC_FLAG_RXC_TXCPIN | |
| HDLC_FLAG_TXC_TXCPIN | HDLC_FLAG_TXC_DPLL | |
| HDLC_FLAG_TXC_BRG | HDLC_FLAG_TXC_RXCPIN); break; |
| default: return -EINVAL; |
| } |
| |
| if (new_line.loopback != 0 && new_line.loopback != 1) |
| return -EINVAL; |
| |
| info->params.flags &= ~(HDLC_FLAG_RXC_RXCPIN | HDLC_FLAG_RXC_DPLL | |
| HDLC_FLAG_RXC_BRG | HDLC_FLAG_RXC_TXCPIN | |
| HDLC_FLAG_TXC_TXCPIN | HDLC_FLAG_TXC_DPLL | |
| HDLC_FLAG_TXC_BRG | HDLC_FLAG_TXC_RXCPIN); |
| info->params.flags |= flags; |
| |
| info->params.loopback = new_line.loopback; |
| |
| if (flags & (HDLC_FLAG_RXC_BRG | HDLC_FLAG_TXC_BRG)) |
| info->params.clock_speed = new_line.clock_rate; |
| else |
| info->params.clock_speed = 0; |
| |
| /* if network interface up, reprogram hardware */ |
| if (info->netcount) |
| program_hw(info); |
| return 0; |
| |
| default: |
| return hdlc_ioctl(dev, ifr, cmd); |
| } |
| } |
| |
| /** |
| * called by network layer when transmit timeout is detected |
| * |
| * dev pointer to network device structure |
| */ |
| static void hdlcdev_tx_timeout(struct net_device *dev) |
| { |
| SLMP_INFO *info = dev_to_port(dev); |
| unsigned long flags; |
| |
| if (debug_level >= DEBUG_LEVEL_INFO) |
| printk("hdlcdev_tx_timeout(%s)\n",dev->name); |
| |
| dev->stats.tx_errors++; |
| dev->stats.tx_aborted_errors++; |
| |
| spin_lock_irqsave(&info->lock,flags); |
| tx_stop(info); |
| spin_unlock_irqrestore(&info->lock,flags); |
| |
| netif_wake_queue(dev); |
| } |
| |
| /** |
| * called by device driver when transmit completes |
| * reenable network layer transmit if stopped |
| * |
| * info pointer to device instance information |
| */ |
| static void hdlcdev_tx_done(SLMP_INFO *info) |
| { |
| if (netif_queue_stopped(info->netdev)) |
| netif_wake_queue(info->netdev); |
| } |
| |
| /** |
| * called by device driver when frame received |
| * pass frame to network layer |
| * |
| * info pointer to device instance information |
| * buf pointer to buffer contianing frame data |
| * size count of data bytes in buf |
| */ |
| static void hdlcdev_rx(SLMP_INFO *info, char *buf, int size) |
| { |
| struct sk_buff *skb = dev_alloc_skb(size); |
| struct net_device *dev = info->netdev; |
| |
| if (debug_level >= DEBUG_LEVEL_INFO) |
| printk("hdlcdev_rx(%s)\n",dev->name); |
| |
| if (skb == NULL) { |
| printk(KERN_NOTICE "%s: can't alloc skb, dropping packet\n", |
| dev->name); |
| dev->stats.rx_dropped++; |
| return; |
| } |
| |
| skb_put_data(skb, buf, size); |
| |
| skb->protocol = hdlc_type_trans(skb, dev); |
| |
| dev->stats.rx_packets++; |
| dev->stats.rx_bytes += size; |
| |
| netif_rx(skb); |
| } |
| |
| static const struct net_device_ops hdlcdev_ops = { |
| .ndo_open = hdlcdev_open, |
| .ndo_stop = hdlcdev_close, |
| .ndo_start_xmit = hdlc_start_xmit, |
| .ndo_do_ioctl = hdlcdev_ioctl, |
| .ndo_tx_timeout = hdlcdev_tx_timeout, |
| }; |
| |
| /** |
| * called by device driver when adding device instance |
| * do generic HDLC initialization |
| * |
| * info pointer to device instance information |
| * |
| * returns 0 if success, otherwise error code |
| */ |
| static int hdlcdev_init(SLMP_INFO *info) |
| { |
| int rc; |
| struct net_device *dev; |
| hdlc_device *hdlc; |
| |
| /* allocate and initialize network and HDLC layer objects */ |
| |
| dev = alloc_hdlcdev(info); |
| if (!dev) { |
| printk(KERN_ERR "%s:hdlc device allocation failure\n",__FILE__); |
| return -ENOMEM; |
| } |
| |
| /* for network layer reporting purposes only */ |
| dev->mem_start = info->phys_sca_base; |
| dev->mem_end = info->phys_sca_base + SCA_BASE_SIZE - 1; |
| dev->irq = info->irq_level; |
| |
| /* network layer callbacks and settings */ |
| dev->netdev_ops = &hdlcdev_ops; |
| dev->watchdog_timeo = 10 * HZ; |
| dev->tx_queue_len = 50; |
| |
| /* generic HDLC layer callbacks and settings */ |
| hdlc = dev_to_hdlc(dev); |
| hdlc->attach = hdlcdev_attach; |
| hdlc->xmit = hdlcdev_xmit; |
| |
| /* register objects with HDLC layer */ |
| rc = register_hdlc_device(dev); |
| if (rc) { |
| printk(KERN_WARNING "%s:unable to register hdlc device\n",__FILE__); |
| free_netdev(dev); |
| return rc; |
| } |
| |
| info->netdev = dev; |
| return 0; |
| } |
| |
| /** |
| * called by device driver when removing device instance |
| * do generic HDLC cleanup |
| * |
| * info pointer to device instance information |
| */ |
| static void hdlcdev_exit(SLMP_INFO *info) |
| { |
| unregister_hdlc_device(info->netdev); |
| free_netdev(info->netdev); |
| info->netdev = NULL; |
| } |
| |
| #endif /* CONFIG_HDLC */ |
| |
| |
| /* Return next bottom half action to perform. |
| * Return Value: BH action code or 0 if nothing to do. |
| */ |
| static int bh_action(SLMP_INFO *info) |
| { |
| unsigned long flags; |
| int rc = 0; |
| |
| spin_lock_irqsave(&info->lock,flags); |
| |
| if (info->pending_bh & BH_RECEIVE) { |
| info->pending_bh &= ~BH_RECEIVE; |
| rc = BH_RECEIVE; |
| } else if (info->pending_bh & BH_TRANSMIT) { |
| info->pending_bh &= ~BH_TRANSMIT; |
| rc = BH_TRANSMIT; |
| } else if (info->pending_bh & BH_STATUS) { |
| info->pending_bh &= ~BH_STATUS; |
| rc = BH_STATUS; |
| } |
| |
| if (!rc) { |
| /* Mark BH routine as complete */ |
| info->bh_running = false; |
| info->bh_requested = false; |
| } |
| |
| spin_unlock_irqrestore(&info->lock,flags); |
| |
| return rc; |
| } |
| |
| /* Perform bottom half processing of work items queued by ISR. |
| */ |
| static void bh_handler(struct work_struct *work) |
| { |
| SLMP_INFO *info = container_of(work, SLMP_INFO, task); |
| int action; |
| |
| if ( debug_level >= DEBUG_LEVEL_BH ) |
| printk( "%s(%d):%s bh_handler() entry\n", |
| __FILE__,__LINE__,info->device_name); |
| |
| info->bh_running = true; |
| |
| while((action = bh_action(info)) != 0) { |
| |
| /* Process work item */ |
| if ( debug_level >= DEBUG_LEVEL_BH ) |
| printk( "%s(%d):%s bh_handler() work item action=%d\n", |
| __FILE__,__LINE__,info->device_name, action); |
| |
| switch (action) { |
| |
| case BH_RECEIVE: |
| bh_receive(info); |
| break; |
| case BH_TRANSMIT: |
| bh_transmit(info); |
| break; |
| case BH_STATUS: |
| bh_status(info); |
| break; |
| default: |
| /* unknown work item ID */ |
| printk("%s(%d):%s Unknown work item ID=%08X!\n", |
| __FILE__,__LINE__,info->device_name,action); |
| break; |
| } |
| } |
| |
| if ( debug_level >= DEBUG_LEVEL_BH ) |
| printk( "%s(%d):%s bh_handler() exit\n", |
| __FILE__,__LINE__,info->device_name); |
| } |
| |
| static void bh_receive(SLMP_INFO *info) |
| { |
| if ( debug_level >= DEBUG_LEVEL_BH ) |
| printk( "%s(%d):%s bh_receive()\n", |
| __FILE__,__LINE__,info->device_name); |
| |
| while( rx_get_frame(info) ); |
| } |
| |
| static void bh_transmit(SLMP_INFO *info) |
| { |
| struct tty_struct *tty = info->port.tty; |
| |
| if ( debug_level >= DEBUG_LEVEL_BH ) |
| printk( "%s(%d):%s bh_transmit() entry\n", |
| __FILE__,__LINE__,info->device_name); |
| |
| if (tty) |
| tty_wakeup(tty); |
| } |
| |
| static void bh_status(SLMP_INFO *info) |
| { |
| if ( debug_level >= DEBUG_LEVEL_BH ) |
| printk( "%s(%d):%s bh_status() entry\n", |
| __FILE__,__LINE__,info->device_name); |
| |
| info->ri_chkcount = 0; |
| info->dsr_chkcount = 0; |
| info->dcd_chkcount = 0; |
| info->cts_chkcount = 0; |
| } |
| |
| static void isr_timer(SLMP_INFO * info) |
| { |
| unsigned char timer = (info->port_num & 1) ? TIMER2 : TIMER0; |
| |
| /* IER2<7..4> = timer<3..0> interrupt enables (0=disabled) */ |
| write_reg(info, IER2, 0); |
| |
| /* TMCS, Timer Control/Status Register |
| * |
| * 07 CMF, Compare match flag (read only) 1=match |
| * 06 ECMI, CMF Interrupt Enable: 0=disabled |
| * 05 Reserved, must be 0 |
| * 04 TME, Timer Enable |
| * 03..00 Reserved, must be 0 |
| * |
| * 0000 0000 |
| */ |
| write_reg(info, (unsigned char)(timer + TMCS), 0); |
| |
| info->irq_occurred = true; |
| |
| if ( debug_level >= DEBUG_LEVEL_ISR ) |
| printk("%s(%d):%s isr_timer()\n", |
| __FILE__,__LINE__,info->device_name); |
| } |
| |
| static void isr_rxint(SLMP_INFO * info) |
| { |
| struct tty_struct *tty = info->port.tty; |
| struct mgsl_icount *icount = &info->icount; |
| unsigned char status = read_reg(info, SR1) & info->ie1_value & (FLGD + IDLD + CDCD + BRKD); |
| unsigned char status2 = read_reg(info, SR2) & info->ie2_value & OVRN; |
| |
| /* clear status bits */ |
| if (status) |
| write_reg(info, SR1, status); |
| |
| if (status2) |
| write_reg(info, SR2, status2); |
| |
| if ( debug_level >= DEBUG_LEVEL_ISR ) |
| printk("%s(%d):%s isr_rxint status=%02X %02x\n", |
| __FILE__,__LINE__,info->device_name,status,status2); |
| |
| if (info->params.mode == MGSL_MODE_ASYNC) { |
| if (status & BRKD) { |
| icount->brk++; |
| |
| /* process break detection if tty control |
| * is not set to ignore it |
| */ |
| if (!(status & info->ignore_status_mask1)) { |
| if (info->read_status_mask1 & BRKD) { |
| tty_insert_flip_char(&info->port, 0, TTY_BREAK); |
| if (tty && (info->port.flags & ASYNC_SAK)) |
| do_SAK(tty); |
| } |
| } |
| } |
| } |
| else { |
| if (status & (FLGD|IDLD)) { |
| if (status & FLGD) |
| info->icount.exithunt++; |
| else if (status & IDLD) |
| info->icount.rxidle++; |
| wake_up_interruptible(&info->event_wait_q); |
| } |
| } |
| |
| if (status & CDCD) { |
| /* simulate a common modem status change interrupt |
| * for our handler |
| */ |
| get_signals( info ); |
| isr_io_pin(info, |
| MISCSTATUS_DCD_LATCHED|(info->serial_signals&SerialSignal_DCD)); |
| } |
| } |
| |
| /* |
| * handle async rx data interrupts |
| */ |
| static void isr_rxrdy(SLMP_INFO * info) |
| { |
| u16 status; |
| unsigned char DataByte; |
| struct mgsl_icount *icount = &info->icount; |
| |
| if ( debug_level >= DEBUG_LEVEL_ISR ) |
| printk("%s(%d):%s isr_rxrdy\n", |
| __FILE__,__LINE__,info->device_name); |
| |
| while((status = read_reg(info,CST0)) & BIT0) |
| { |
| int flag = 0; |
| bool over = false; |
| DataByte = read_reg(info,TRB); |
| |
| icount->rx++; |
| |
| if ( status & (PE + FRME + OVRN) ) { |
| printk("%s(%d):%s rxerr=%04X\n", |
| __FILE__,__LINE__,info->device_name,status); |
| |
| /* update error statistics */ |
| if (status & PE) |
| icount->parity++; |
| else if (status & FRME) |
| icount->frame++; |
| else if (status & OVRN) |
| icount->overrun++; |
| |
| /* discard char if tty control flags say so */ |
| if (status & info->ignore_status_mask2) |
| continue; |
| |
| status &= info->read_status_mask2; |
| |
| if (status & PE) |
| flag = TTY_PARITY; |
| else if (status & FRME) |
| flag = TTY_FRAME; |
| if (status & OVRN) { |
| /* Overrun is special, since it's |
| * reported immediately, and doesn't |
| * affect the current character |
| */ |
| over = true; |
| } |
| } /* end of if (error) */ |
| |
| tty_insert_flip_char(&info->port, DataByte, flag); |
| if (over) |
| tty_insert_flip_char(&info->port, 0, TTY_OVERRUN); |
| } |
| |
| if ( debug_level >= DEBUG_LEVEL_ISR ) { |
| printk("%s(%d):%s rx=%d brk=%d parity=%d frame=%d overrun=%d\n", |
| __FILE__,__LINE__,info->device_name, |
| icount->rx,icount->brk,icount->parity, |
| icount->frame,icount->overrun); |
| } |
| |
| tty_flip_buffer_push(&info->port); |
| } |
| |
| static void isr_txeom(SLMP_INFO * info, unsigned char status) |
| { |
| if ( debug_level >= DEBUG_LEVEL_ISR ) |
| printk("%s(%d):%s isr_txeom status=%02x\n", |
| __FILE__,__LINE__,info->device_name,status); |
| |
| write_reg(info, TXDMA + DIR, 0x00); /* disable Tx DMA IRQs */ |
| write_reg(info, TXDMA + DSR, 0xc0); /* clear IRQs and disable DMA */ |
| write_reg(info, TXDMA + DCMD, SWABORT); /* reset/init DMA channel */ |
| |
| if (status & UDRN) { |
| write_reg(info, CMD, TXRESET); |
| write_reg(info, CMD, TXENABLE); |
| } else |
| write_reg(info, CMD, TXBUFCLR); |
| |
| /* disable and clear tx interrupts */ |
| info->ie0_value &= ~TXRDYE; |
| info->ie1_value &= ~(IDLE + UDRN); |
| write_reg16(info, IE0, (unsigned short)((info->ie1_value << 8) + info->ie0_value)); |
| write_reg(info, SR1, (unsigned char)(UDRN + IDLE)); |
| |
| if ( info->tx_active ) { |
| if (info->params.mode != MGSL_MODE_ASYNC) { |
| if (status & UDRN) |
| info->icount.txunder++; |
| else if (status & IDLE) |
| info->icount.txok++; |
| } |
| |
| info->tx_active = false; |
| info->tx_count = info->tx_put = info->tx_get = 0; |
| |
| del_timer(&info->tx_timer); |
| |
| if (info->params.mode != MGSL_MODE_ASYNC && info->drop_rts_on_tx_done ) { |
| info->serial_signals &= ~SerialSignal_RTS; |
| info->drop_rts_on_tx_done = false; |
| set_signals(info); |
| } |
| |
| #if SYNCLINK_GENERIC_HDLC |
| if (info->netcount) |
| hdlcdev_tx_done(info); |
| else |
| #endif |
| { |
| if (info->port.tty && (info->port.tty->stopped || info->port.tty->hw_stopped)) { |
| tx_stop(info); |
| return; |
| } |
| info->pending_bh |= BH_TRANSMIT; |
| } |
| } |
| } |
| |
| |
| /* |
| * handle tx status interrupts |
| */ |
| static void isr_txint(SLMP_INFO * info) |
| { |
| unsigned char status = read_reg(info, SR1) & info->ie1_value & (UDRN + IDLE + CCTS); |
| |
| /* clear status bits */ |
| write_reg(info, SR1, status); |
| |
| if ( debug_level >= DEBUG_LEVEL_ISR ) |
| printk("%s(%d):%s isr_txint status=%02x\n", |
| __FILE__,__LINE__,info->device_name,status); |
| |
| if (status & (UDRN + IDLE)) |
| isr_txeom(info, status); |
| |
| if (status & CCTS) { |
| /* simulate a common modem status change interrupt |
| * for our handler |
| */ |
| get_signals( info ); |
| isr_io_pin(info, |
| MISCSTATUS_CTS_LATCHED|(info->serial_signals&SerialSignal_CTS)); |
| |
| } |
| } |
| |
| /* |
| * handle async tx data interrupts |
| */ |
| static void isr_txrdy(SLMP_INFO * info) |
| { |
| if ( debug_level >= DEBUG_LEVEL_ISR ) |
| printk("%s(%d):%s isr_txrdy() tx_count=%d\n", |
| __FILE__,__LINE__,info->device_name,info->tx_count); |
| |
| if (info->params.mode != MGSL_MODE_ASYNC) { |
| /* disable TXRDY IRQ, enable IDLE IRQ */ |
| info->ie0_value &= ~TXRDYE; |
| info->ie1_value |= IDLE; |
| write_reg16(info, IE0, (unsigned short)((info->ie1_value << 8) + info->ie0_value)); |
| return; |
| } |
| |
| if (info->port.tty && (info->port.tty->stopped || info->port.tty->hw_stopped)) { |
| tx_stop(info); |
| return; |
| } |
| |
| if ( info->tx_count ) |
| tx_load_fifo( info ); |
| else { |
| info->tx_active = false; |
| info->ie0_value &= ~TXRDYE; |
| write_reg(info, IE0, info->ie0_value); |
| } |
| |
| if (info->tx_count < WAKEUP_CHARS) |
| info->pending_bh |= BH_TRANSMIT; |
| } |
| |
| static void isr_rxdmaok(SLMP_INFO * info) |
| { |
| /* BIT7 = EOT (end of transfer) |
| * BIT6 = EOM (end of message/frame) |
| */ |
| unsigned char status = read_reg(info,RXDMA + DSR) & 0xc0; |
| |
| /* clear IRQ (BIT0 must be 1 to prevent clearing DE bit) */ |
| write_reg(info, RXDMA + DSR, (unsigned char)(status | 1)); |
| |
| if ( debug_level >= DEBUG_LEVEL_ISR ) |
| printk("%s(%d):%s isr_rxdmaok(), status=%02x\n", |
| __FILE__,__LINE__,info->device_name,status); |
| |
| info->pending_bh |= BH_RECEIVE; |
| } |
| |
| static void isr_rxdmaerror(SLMP_INFO * info) |
| { |
| /* BIT5 = BOF (buffer overflow) |
| * BIT4 = COF (counter overflow) |
| */ |
| unsigned char status = read_reg(info,RXDMA + DSR) & 0x30; |
| |
| /* clear IRQ (BIT0 must be 1 to prevent clearing DE bit) */ |
| write_reg(info, RXDMA + DSR, (unsigned char)(status | 1)); |
| |
| if ( debug_level >= DEBUG_LEVEL_ISR ) |
| printk("%s(%d):%s isr_rxdmaerror(), status=%02x\n", |
| __FILE__,__LINE__,info->device_name,status); |
| |
| info->rx_overflow = true; |
| info->pending_bh |= BH_RECEIVE; |
| } |
| |
| static void isr_txdmaok(SLMP_INFO * info) |
| { |
| unsigned char status_reg1 = read_reg(info, SR1); |
| |
| write_reg(info, TXDMA + DIR, 0x00); /* disable Tx DMA IRQs */ |
| write_reg(info, TXDMA + DSR, 0xc0); /* clear IRQs and disable DMA */ |
| write_reg(info, TXDMA + DCMD, SWABORT); /* reset/init DMA channel */ |
| |
| if ( debug_level >= DEBUG_LEVEL_ISR ) |
| printk("%s(%d):%s isr_txdmaok(), status=%02x\n", |
| __FILE__,__LINE__,info->device_name,status_reg1); |
| |
| /* program TXRDY as FIFO empty flag, enable TXRDY IRQ */ |
| write_reg16(info, TRC0, 0); |
| info->ie0_value |= TXRDYE; |
| write_reg(info, IE0, info->ie0_value); |
| } |
| |
| static void isr_txdmaerror(SLMP_INFO * info) |
| { |
| /* BIT5 = BOF (buffer overflow) |
| * BIT4 = COF (counter overflow) |
| */ |
| unsigned char status = read_reg(info,TXDMA + DSR) & 0x30; |
| |
| /* clear IRQ (BIT0 must be 1 to prevent clearing DE bit) */ |
| write_reg(info, TXDMA + DSR, (unsigned char)(status | 1)); |
| |
| if ( debug_level >= DEBUG_LEVEL_ISR ) |
| printk("%s(%d):%s isr_txdmaerror(), status=%02x\n", |
| __FILE__,__LINE__,info->device_name,status); |
| } |
| |
| /* handle input serial signal changes |
| */ |
| static void isr_io_pin( SLMP_INFO *info, u16 status ) |
| { |
| struct mgsl_icount *icount; |
| |
| if ( debug_level >= DEBUG_LEVEL_ISR ) |
| printk("%s(%d):isr_io_pin status=%04X\n", |
| __FILE__,__LINE__,status); |
| |
| if (status & (MISCSTATUS_CTS_LATCHED | MISCSTATUS_DCD_LATCHED | |
| MISCSTATUS_DSR_LATCHED | MISCSTATUS_RI_LATCHED) ) { |
| icount = &info->icount; |
| /* update input line counters */ |
| if (status & MISCSTATUS_RI_LATCHED) { |
| icount->rng++; |
| if ( status & SerialSignal_RI ) |
| info->input_signal_events.ri_up++; |
| else |
| info->input_signal_events.ri_down++; |
| } |
| if (status & MISCSTATUS_DSR_LATCHED) { |
| icount->dsr++; |
| if ( status & SerialSignal_DSR ) |
| info->input_signal_events.dsr_up++; |
| else |
| info->input_signal_events.dsr_down++; |
| } |
| if (status & MISCSTATUS_DCD_LATCHED) { |
| if ((info->dcd_chkcount)++ >= IO_PIN_SHUTDOWN_LIMIT) { |
| info->ie1_value &= ~CDCD; |
| write_reg(info, IE1, info->ie1_value); |
| } |
| icount->dcd++; |
| if (status & SerialSignal_DCD) { |
| info->input_signal_events.dcd_up++; |
| } else |
| info->input_signal_events.dcd_down++; |
| #if SYNCLINK_GENERIC_HDLC |
| if (info->netcount) { |
| if (status & SerialSignal_DCD) |
| netif_carrier_on(info->netdev); |
| else |
| netif_carrier_off(info->netdev); |
| } |
| #endif |
| } |
| if (status & MISCSTATUS_CTS_LATCHED) |
| { |
| if ((info->cts_chkcount)++ >= IO_PIN_SHUTDOWN_LIMIT) { |
| info->ie1_value &= ~CCTS; |
| write_reg(info, IE1, info->ie1_value); |
| } |
| icount->cts++; |
| if ( status & SerialSignal_CTS ) |
| info->input_signal_events.cts_up++; |
| else |
| info->input_signal_events.cts_down++; |
| } |
| wake_up_interruptible(&info->status_event_wait_q); |
| wake_up_interruptible(&info->event_wait_q); |
| |
| if (tty_port_check_carrier(&info->port) && |
| (status & MISCSTATUS_DCD_LATCHED) ) { |
| if ( debug_level >= DEBUG_LEVEL_ISR ) |
| printk("%s CD now %s...", info->device_name, |
| (status & SerialSignal_DCD) ? "on" : "off"); |
| if (status & SerialSignal_DCD) |
| wake_up_interruptible(&info->port.open_wait); |
| else { |
| if ( debug_level >= DEBUG_LEVEL_ISR ) |
| printk("doing serial hangup..."); |
| if (info->port.tty) |
| tty_hangup(info->port.tty); |
| } |
| } |
| |
| if (tty_port_cts_enabled(&info->port) && |
| (status & MISCSTATUS_CTS_LATCHED) ) { |
| if ( info->port.tty ) { |
| if (info->port.tty->hw_stopped) { |
| if (status & SerialSignal_CTS) { |
| if ( debug_level >= DEBUG_LEVEL_ISR ) |
| printk("CTS tx start..."); |
| info->port.tty->hw_stopped = 0; |
| tx_start(info); |
| info->pending_bh |= BH_TRANSMIT; |
| return; |
| } |
| } else { |
| if (!(status & SerialSignal_CTS)) { |
| if ( debug_level >= DEBUG_LEVEL_ISR ) |
| printk("CTS tx stop..."); |
| info->port.tty->hw_stopped = 1; |
| tx_stop(info); |
| } |
| } |
| } |
| } |
| } |
| |
| info->pending_bh |= BH_STATUS; |
| } |
| |
| /* Interrupt service routine entry point. |
| * |
| * Arguments: |
| * irq interrupt number that caused interrupt |
| * dev_id device ID supplied during interrupt registration |
| * regs interrupted processor context |
| */ |
| static irqreturn_t synclinkmp_interrupt(int dummy, void *dev_id) |
| { |
| SLMP_INFO *info = dev_id; |
| unsigned char status, status0, status1=0; |
| unsigned char dmastatus, dmastatus0, dmastatus1=0; |
| unsigned char timerstatus0, timerstatus1=0; |
| unsigned char shift; |
| unsigned int i; |
| unsigned short tmp; |
| |
| if ( debug_level >= DEBUG_LEVEL_ISR ) |
| printk(KERN_DEBUG "%s(%d): synclinkmp_interrupt(%d)entry.\n", |
| __FILE__, __LINE__, info->irq_level); |
| |
| spin_lock(&info->lock); |
| |
| for(;;) { |
| |
| /* get status for SCA0 (ports 0-1) */ |
| tmp = read_reg16(info, ISR0); /* get ISR0 and ISR1 in one read */ |
| status0 = (unsigned char)tmp; |
| dmastatus0 = (unsigned char)(tmp>>8); |
| timerstatus0 = read_reg(info, ISR2); |
| |
| if ( debug_level >= DEBUG_LEVEL_ISR ) |
| printk(KERN_DEBUG "%s(%d):%s status0=%02x, dmastatus0=%02x, timerstatus0=%02x\n", |
| __FILE__, __LINE__, info->device_name, |
| status0, dmastatus0, timerstatus0); |
| |
| if (info->port_count == 4) { |
| /* get status for SCA1 (ports 2-3) */ |
| tmp = read_reg16(info->port_array[2], ISR0); |
| status1 = (unsigned char)tmp; |
| dmastatus1 = (unsigned char)(tmp>>8); |
| timerstatus1 = read_reg(info->port_array[2], ISR2); |
| |
| if ( debug_level >= DEBUG_LEVEL_ISR ) |
| printk("%s(%d):%s status1=%02x, dmastatus1=%02x, timerstatus1=%02x\n", |
| __FILE__,__LINE__,info->device_name, |
| status1,dmastatus1,timerstatus1); |
| } |
| |
| if (!status0 && !dmastatus0 && !timerstatus0 && |
| !status1 && !dmastatus1 && !timerstatus1) |
| break; |
| |
| for(i=0; i < info->port_count ; i++) { |
| if (info->port_array[i] == NULL) |
| continue; |
| if (i < 2) { |
| status = status0; |
| dmastatus = dmastatus0; |
| } else { |
| status = status1; |
| dmastatus = dmastatus1; |
| } |
| |
| shift = i & 1 ? 4 :0; |
| |
| if (status & BIT0 << shift) |
| isr_rxrdy(info->port_array[i]); |
| if (status & BIT1 << shift) |
| isr_txrdy(info->port_array[i]); |
| if (status & BIT2 << shift) |
| isr_rxint(info->port_array[i]); |
| if (status & BIT3 << shift) |
| isr_txint(info->port_array[i]); |
| |
| if (dmastatus & BIT0 << shift) |
| isr_rxdmaerror(info->port_array[i]); |
| if (dmastatus & BIT1 << shift) |
| isr_rxdmaok(info->port_array[i]); |
| if (dmastatus & BIT2 << shift) |
| isr_txdmaerror(info->port_array[i]); |
| if (dmastatus & BIT3 << shift) |
| isr_txdmaok(info->port_array[i]); |
| } |
| |
| if (timerstatus0 & (BIT5 | BIT4)) |
| isr_timer(info->port_array[0]); |
| if (timerstatus0 & (BIT7 | BIT6)) |
| isr_timer(info->port_array[1]); |
| if (timerstatus1 & (BIT5 | BIT4)) |
| isr_timer(info->port_array[2]); |
| if (timerstatus1 & (BIT7 | BIT6)) |
| isr_timer(info->port_array[3]); |
| } |
| |
| for(i=0; i < info->port_count ; i++) { |
| SLMP_INFO * port = info->port_array[i]; |
| |
| /* Request bottom half processing if there's something |
| * for it to do and the bh is not already running. |
| * |
| * Note: startup adapter diags require interrupts. |
| * do not request bottom half processing if the |
| * device is not open in a normal mode. |
| */ |
| if ( port && (port->port.count || port->netcount) && |
| port->pending_bh && !port->bh_running && |
| !port->bh_requested ) { |
| if ( debug_level >= DEBUG_LEVEL_ISR ) |
| printk("%s(%d):%s queueing bh task.\n", |
| __FILE__,__LINE__,port->device_name); |
| schedule_work(&port->task); |
| port->bh_requested = true; |
| } |
| } |
| |
| spin_unlock(&info->lock); |
| |
| if ( debug_level >= DEBUG_LEVEL_ISR ) |
| printk(KERN_DEBUG "%s(%d):synclinkmp_interrupt(%d)exit.\n", |
| __FILE__, __LINE__, info->irq_level); |
| return IRQ_HANDLED; |
| } |
| |
| /* Initialize and start device. |
| */ |
| static int startup(SLMP_INFO * info) |
| { |
| if ( debug_level >= DEBUG_LEVEL_INFO ) |
| printk("%s(%d):%s tx_releaseup()\n",__FILE__,__LINE__,info->device_name); |
| |
| if (tty_port_initialized(&info->port)) |
| return 0; |
| |
| if (!info->tx_buf) { |
| info->tx_buf = kmalloc(info->max_frame_size, GFP_KERNEL); |
| if (!info->tx_buf) { |
| printk(KERN_ERR"%s(%d):%s can't allocate transmit buffer\n", |
| __FILE__,__LINE__,info->device_name); |
| return -ENOMEM; |
| } |
| } |
| |
| info->pending_bh = 0; |
| |
| memset(&info->icount, 0, sizeof(info->icount)); |
| |
| /* program hardware for current parameters */ |
| reset_port(info); |
| |
| change_params(info); |
| |
| mod_timer(&info->status_timer, jiffies + msecs_to_jiffies(10)); |
| |
| if (info->port.tty) |
| clear_bit(TTY_IO_ERROR, &info->port.tty->flags); |
| |
| tty_port_set_initialized(&info->port, 1); |
| |
| return 0; |
| } |
| |
| /* Called by close() and hangup() to shutdown hardware |
| */ |
| static void shutdown(SLMP_INFO * info) |
| { |
| unsigned long flags; |
| |
| if (!tty_port_initialized(&info->port)) |
| return; |
| |
| if (debug_level >= DEBUG_LEVEL_INFO) |
| printk("%s(%d):%s synclinkmp_shutdown()\n", |
| __FILE__,__LINE__, info->device_name ); |
| |
| /* clear status wait queue because status changes */ |
| /* can't happen after shutting down the hardware */ |
| wake_up_interruptible(&info->status_event_wait_q); |
| wake_up_interruptible(&info->event_wait_q); |
| |
| del_timer(&info->tx_timer); |
| del_timer(&info->status_timer); |
| |
| kfree(info->tx_buf); |
| info->tx_buf = NULL; |
| |
| spin_lock_irqsave(&info->lock,flags); |
| |
| reset_port(info); |
| |
| if (!info->port.tty || info->port.tty->termios.c_cflag & HUPCL) { |
| info->serial_signals &= ~(SerialSignal_RTS | SerialSignal_DTR); |
| set_signals(info); |
| } |
| |
| spin_unlock_irqrestore(&info->lock,flags); |
| |
| if (info->port.tty) |
| set_bit(TTY_IO_ERROR, &info->port.tty->flags); |
| |
| tty_port_set_initialized(&info->port, 0); |
| } |
| |
| static void program_hw(SLMP_INFO *info) |
| { |
| unsigned long flags; |
| |
| spin_lock_irqsave(&info->lock,flags); |
| |
| rx_stop(info); |
| tx_stop(info); |
| |
| info->tx_count = info->tx_put = info->tx_get = 0; |
| |
| if (info->params.mode == MGSL_MODE_HDLC || info->netcount) |
| hdlc_mode(info); |
| else |
| async_mode(info); |
| |
| set_signals(info); |
| |
| info->dcd_chkcount = 0; |
| info->cts_chkcount = 0; |
| info->ri_chkcount = 0; |
| info->dsr_chkcount = 0; |
| |
| info->ie1_value |= (CDCD|CCTS); |
| write_reg(info, IE1, info->ie1_value); |
| |
| get_signals(info); |
| |
| if (info->netcount || (info->port.tty && info->port.tty->termios.c_cflag & CREAD) ) |
| rx_start(info); |
| |
| spin_unlock_irqrestore(&info->lock,flags); |
| } |
| |
| /* Reconfigure adapter based on new parameters |
| */ |
| static void change_params(SLMP_INFO *info) |
| { |
| unsigned cflag; |
| int bits_per_char; |
| |
| if (!info->port.tty) |
| return; |
| |
| if (debug_level >= DEBUG_LEVEL_INFO) |
| printk("%s(%d):%s change_params()\n", |
| __FILE__,__LINE__, info->device_name ); |
| |
| cflag = info->port.tty->termios.c_cflag; |
| |
| /* if B0 rate (hangup) specified then negate RTS and DTR */ |
| /* otherwise assert RTS and DTR */ |
| if (cflag & CBAUD) |
| info->serial_signals |= SerialSignal_RTS | SerialSignal_DTR; |
| else |
| info->serial_signals &= ~(SerialSignal_RTS | SerialSignal_DTR); |
| |
| /* byte size and parity */ |
| |
| switch (cflag & CSIZE) { |
| case CS5: info->params.data_bits = 5; break; |
| case CS6: info->params.data_bits = 6; break; |
| case CS7: info->params.data_bits = 7; break; |
| case CS8: info->params.data_bits = 8; break; |
| /* Never happens, but GCC is too dumb to figure it out */ |
| default: info->params.data_bits = 7; break; |
| } |
| |
| if (cflag & CSTOPB) |
| info->params.stop_bits = 2; |
| else |
| info->params.stop_bits = 1; |
| |
| info->params.parity = ASYNC_PARITY_NONE; |
| if (cflag & PARENB) { |
| if (cflag & PARODD) |
| info->params.parity = ASYNC_PARITY_ODD; |
| else |
| info->params.parity = ASYNC_PARITY_EVEN; |
| #ifdef CMSPAR |
| if (cflag & CMSPAR) |
| info->params.parity = ASYNC_PARITY_SPACE; |
| #endif |
| } |
| |
| /* calculate number of jiffies to transmit a full |
| * FIFO (32 bytes) at specified data rate |
| */ |
| bits_per_char = info->params.data_bits + |
| info->params.stop_bits + 1; |
| |
| /* if port data rate is set to 460800 or less then |
| * allow tty settings to override, otherwise keep the |
| * current data rate. |
| */ |
| if (info->params.data_rate <= 460800) { |
| info->params.data_rate = tty_get_baud_rate(info->port.tty); |
| } |
| |
| if ( info->params.data_rate ) { |
| info->timeout = (32*HZ*bits_per_char) / |
| info->params.data_rate; |
| } |
| info->timeout += HZ/50; /* Add .02 seconds of slop */ |
| |
| tty_port_set_cts_flow(&info->port, cflag & CRTSCTS); |
| tty_port_set_check_carrier(&info->port, ~cflag & CLOCAL); |
| |
| /* process tty input control flags */ |
| |
| info->read_status_mask2 = OVRN; |
| if (I_INPCK(info->port.tty)) |
| info->read_status_mask2 |= PE | FRME; |
| if (I_BRKINT(info->port.tty) || I_PARMRK(info->port.tty)) |
| info->read_status_mask1 |= BRKD; |
| if (I_IGNPAR(info->port.tty)) |
| info->ignore_status_mask2 |= PE | FRME; |
| if (I_IGNBRK(info->port.tty)) { |
| info->ignore_status_mask1 |= BRKD; |
| /* If ignoring parity and break indicators, ignore |
| * overruns too. (For real raw support). |
| */ |
| if (I_IGNPAR(info->port.tty)) |
| info->ignore_status_mask2 |= OVRN; |
| } |
| |
| program_hw(info); |
| } |
| |
| static int get_stats(SLMP_INFO * info, struct mgsl_icount __user *user_icount) |
| { |
| int err; |
| |
| if (debug_level >= DEBUG_LEVEL_INFO) |
| printk("%s(%d):%s get_params()\n", |
| __FILE__,__LINE__, info->device_name); |
| |
| if (!user_icount) { |
| memset(&info->icount, 0, sizeof(info->icount)); |
| } else { |
| mutex_lock(&info->port.mutex); |
| COPY_TO_USER(err, user_icount, &info->icount, sizeof(struct mgsl_icount)); |
| mutex_unlock(&info->port.mutex); |
| if (err) |
| return -EFAULT; |
| } |
| |
| return 0; |
| } |
| |
| static int get_params(SLMP_INFO * info, MGSL_PARAMS __user *user_params) |
| { |
| int err; |
| if (debug_level >= DEBUG_LEVEL_INFO) |
| printk("%s(%d):%s get_params()\n", |
| __FILE__,__LINE__, info->device_name); |
| |
| mutex_lock(&info->port.mutex); |
| COPY_TO_USER(err,user_params, &info->params, sizeof(MGSL_PARAMS)); |
| mutex_unlock(&info->port.mutex); |
| if (err) { |
| if ( debug_level >= DEBUG_LEVEL_INFO ) |
| printk( "%s(%d):%s get_params() user buffer copy failed\n", |
| __FILE__,__LINE__,info->device_name); |
| return -EFAULT; |
| } |
| |
| return 0; |
| } |
| |
| static int set_params(SLMP_INFO * info, MGSL_PARAMS __user *new_params) |
| { |
| unsigned long flags; |
| MGSL_PARAMS tmp_params; |
| int err; |
| |
| if (debug_level >= DEBUG_LEVEL_INFO) |
| printk("%s(%d):%s set_params\n", |
| __FILE__,__LINE__,info->device_name ); |
| COPY_FROM_USER(err,&tmp_params, new_params, sizeof(MGSL_PARAMS)); |
| if (err) { |
| if ( debug_level >= DEBUG_LEVEL_INFO ) |
| printk( "%s(%d):%s set_params() user buffer copy failed\n", |
| __FILE__,__LINE__,info->device_name); |
| return -EFAULT; |
| } |
| |
| mutex_lock(&info->port.mutex); |
| spin_lock_irqsave(&info->lock,flags); |
| memcpy(&info->params,&tmp_params,sizeof(MGSL_PARAMS)); |
| spin_unlock_irqrestore(&info->lock,flags); |
| |
| change_params(info); |
| mutex_unlock(&info->port.mutex); |
| |
| return 0; |
| } |
| |
| static int get_txidle(SLMP_INFO * info, int __user *idle_mode) |
| { |
| int err; |
| |
| if (debug_level >= DEBUG_LEVEL_INFO) |
| printk("%s(%d):%s get_txidle()=%d\n", |
| __FILE__,__LINE__, info->device_name, info->idle_mode); |
| |
| COPY_TO_USER(err,idle_mode, &info->idle_mode, sizeof(int)); |
| if (err) { |
| if ( debug_level >= DEBUG_LEVEL_INFO ) |
| printk( "%s(%d):%s get_txidle() user buffer copy failed\n", |
| __FILE__,__LINE__,info->device_name); |
| return -EFAULT; |
| } |
| |
| return 0; |
| } |
| |
| static int set_txidle(SLMP_INFO * info, int idle_mode) |
| { |
| unsigned long flags; |
| |
| if (debug_level >= DEBUG_LEVEL_INFO) |
| printk("%s(%d):%s set_txidle(%d)\n", |
| __FILE__,__LINE__,info->device_name, idle_mode ); |
| |
| spin_lock_irqsave(&info->lock,flags); |
| info->idle_mode = idle_mode; |
| tx_set_idle( info ); |
| spin_unlock_irqrestore(&info->lock,flags); |
| return 0; |
| } |
| |
| static int tx_enable(SLMP_INFO * info, int enable) |
| { |
| unsigned long flags; |
| |
| if (debug_level >= DEBUG_LEVEL_INFO) |
| printk("%s(%d):%s tx_enable(%d)\n", |
| __FILE__,__LINE__,info->device_name, enable); |
| |
| spin_lock_irqsave(&info->lock,flags); |
| if ( enable ) { |
| if ( !info->tx_enabled ) { |
| tx_start(info); |
| } |
| } else { |
| if ( info->tx_enabled ) |
| tx_stop(info); |
| } |
| spin_unlock_irqrestore(&info->lock,flags); |
| return 0; |
| } |
| |
| /* abort send HDLC frame |
| */ |
| static int tx_abort(SLMP_INFO * info) |
| { |
| unsigned long flags; |
| |
| if (debug_level >= DEBUG_LEVEL_INFO) |
| printk("%s(%d):%s tx_abort()\n", |
| __FILE__,__LINE__,info->device_name); |
| |
| spin_lock_irqsave(&info->lock,flags); |
| if ( info->tx_active && info->params.mode == MGSL_MODE_HDLC ) { |
| info->ie1_value &= ~UDRN; |
| info->ie1_value |= IDLE; |
| write_reg(info, IE1, info->ie1_value); /* disable tx status interrupts */ |
| write_reg(info, SR1, (unsigned char)(IDLE + UDRN)); /* clear pending */ |
| |
| write_reg(info, TXDMA + DSR, 0); /* disable DMA channel */ |
| write_reg(info, TXDMA + DCMD, SWABORT); /* reset/init DMA channel */ |
| |
| write_reg(info, CMD, TXABORT); |
| } |
| spin_unlock_irqrestore(&info->lock,flags); |
| return 0; |
| } |
| |
| static int rx_enable(SLMP_INFO * info, int enable) |
| { |
| unsigned long flags; |
| |
| if (debug_level >= DEBUG_LEVEL_INFO) |
| printk("%s(%d):%s rx_enable(%d)\n", |
| __FILE__,__LINE__,info->device_name,enable); |
| |
| spin_lock_irqsave(&info->lock,flags); |
| if ( enable ) { |
| if ( !info->rx_enabled ) |
| rx_start(info); |
| } else { |
| if ( info->rx_enabled ) |
| rx_stop(info); |
| } |
| spin_unlock_irqrestore(&info->lock,flags); |
| return 0; |
| } |
| |
| /* wait for specified event to occur |
| */ |
| static int wait_mgsl_event(SLMP_INFO * info, int __user *mask_ptr) |
| { |
| unsigned long flags; |
| int s; |
| int rc=0; |
| struct mgsl_icount cprev, cnow; |
| int events; |
| int mask; |
| struct _input_signal_events oldsigs, newsigs; |
| DECLARE_WAITQUEUE(wait, current); |
| |
| COPY_FROM_USER(rc,&mask, mask_ptr, sizeof(int)); |
| if (rc) { |
| return -EFAULT; |
| } |
| |
| if (debug_level >= DEBUG_LEVEL_INFO) |
| printk("%s(%d):%s wait_mgsl_event(%d)\n", |
| __FILE__,__LINE__,info->device_name,mask); |
| |
| spin_lock_irqsave(&info->lock,flags); |
| |
| /* return immediately if state matches requested events */ |
| get_signals(info); |
| s = info->serial_signals; |
| |
| events = mask & |
| ( ((s & SerialSignal_DSR) ? MgslEvent_DsrActive:MgslEvent_DsrInactive) + |
| ((s & SerialSignal_DCD) ? MgslEvent_DcdActive:MgslEvent_DcdInactive) + |
| ((s & SerialSignal_CTS) ? MgslEvent_CtsActive:MgslEvent_CtsInactive) + |
| ((s & SerialSignal_RI) ? MgslEvent_RiActive :MgslEvent_RiInactive) ); |
| if (events) { |
| spin_unlock_irqrestore(&info->lock,flags); |
| goto exit; |
| } |
| |
| /* save current irq counts */ |
| cprev = info->icount; |
| oldsigs = info->input_signal_events; |
| |
| /* enable hunt and idle irqs if needed */ |
| if (mask & (MgslEvent_ExitHuntMode+MgslEvent_IdleReceived)) { |
| unsigned char oldval = info->ie1_value; |
| unsigned char newval = oldval + |
| (mask & MgslEvent_ExitHuntMode ? FLGD:0) + |
| (mask & MgslEvent_IdleReceived ? IDLD:0); |
| if ( oldval != newval ) { |
| info->ie1_value = newval; |
| write_reg(info, IE1, info->ie1_value); |
| } |
| } |
| |
| set_current_state(TASK_INTERRUPTIBLE); |
| add_wait_queue(&info->event_wait_q, &wait); |
| |
| spin_unlock_irqrestore(&info->lock,flags); |
| |
| for(;;) { |
| schedule(); |
| if (signal_pending(current)) { |
| rc = -ERESTARTSYS; |
| break; |
| } |
| |
| /* get current irq counts */ |
| spin_lock_irqsave(&info->lock,flags); |
| cnow = info->icount; |
| newsigs = info->input_signal_events; |
| set_current_state(TASK_INTERRUPTIBLE); |
|